1240443 has 6 divisors (see below), whose sum is σ = 1791764. Its totient is φ = 826956.

The previous prime is 1240423. The next prime is 1240483. The reversal of 1240443 is 3440421.

It is not a de Polignac number, because 1240443 - 2¹⁴ = 1224059 is a prime.

It is a Duffinian number.

1240443 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1240423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68905 + ... + 68922.

2^1240443 is an apocalyptic number.

1240443 is a deficient number, since it is larger than the sum of its proper divisors (551321).

1240443 is a wasteful number, since it uses less digits than its factorization.

1240443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137833 (or 137830 counting only the distinct ones).

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

The square root of 1240443 is about 1113.7517676754. The cubic root of 1240443 is about 107.4464994284.

Adding to 1240443 its reverse (3440421), we get a palindrome (4680864).

The spelling of 1240443 in words is "one million, two hundred forty thousand, four hundred forty-three".