1250640402 has 32 divisors (see below), whose sum is σ = 2736322560. Its totient is φ = 377919120.

The previous prime is 1250640373. The next prime is 1250640403. The reversal of 1250640402 is 2040460521.

It is a super-2 number, since 2×1250640402² = 3128202830229443208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1250640403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2698 + ... + 50085.

It is an arithmetic number, because the mean of its divisors is an integer number (85510080).

Almost surely, 2^1250640402 is an apocalyptic number.

1250640402 is an abundant number, since it is smaller than the sum of its proper divisors (1485682158).

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

1250640402 is a wasteful number, since it uses less digits than its factorization.

1250640402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53158.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1250640402 is about 35364.3945515825. The cubic root of 1250640402 is about 1077.4012741805.

The spelling of 1250640402 in words is "one billion, two hundred fifty million, six hundred forty thousand, four hundred two".