1253431840 has 48 divisors (see below), whose sum is σ = 2963822400. Its totient is φ = 500934400.

The previous prime is 1253431819. The next prime is 1253431841. The reversal of 1253431840 is 481343521.

It is not an unprimeable number, because it can be changed into a prime (1253431841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229461 + ... + 234859.

It is an arithmetic number, because the mean of its divisors is an integer number (61746300).

Almost surely, 2^1253431840 is an apocalyptic number.

1253431840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253431840 is an abundant number, since it is smaller than the sum of its proper divisors (1710390560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1253431840 is a wasteful number, since it uses less digits than its factorization.

1253431840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6865 (or 6857 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 1253431840 is about 35403.8393398230. The cubic root of 1253431840 is about 1078.2022675589.

The spelling of 1253431840 in words is "one billion, two hundred fifty-three million, four hundred thirty-one thousand, eight hundred forty".