1440243 has 12 divisors (see below), whose sum is σ = 2377648. Its totient is φ = 822960.

The previous prime is 1440239. The next prime is 1440247. The reversal of 1440243 is 3420441.

It is an interprime number because it is at equal distance from previous prime (1440239) and next prime (1440247).

It is not a de Polignac number, because 1440243 - 2² = 1440239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1440247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11368 + ... + 11493.

2^1440243 is an apocalyptic number.

1440243 is a deficient number, since it is larger than the sum of its proper divisors (937405).

1440243 is a wasteful number, since it uses less digits than its factorization.

1440243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22874 (or 22871 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1440243 is about 1200.1012457289. The cubic root of 1440243 is about 112.9306751017.

Adding to 1440243 its reverse (3420441), we get a palindrome (4860684).

The spelling of 1440243 in words is "one million, four hundred forty thousand, two hundred forty-three".