1251955944 has 48 divisors (see below), whose sum is σ = 3392488320. Its totient is φ = 417100320.

The previous prime is 1251955933. The next prime is 1251955979. The reversal of 1251955944 is 4495591521.

1251955944 is a `hidden beast` number, since 1 + 2 + 51 + 9 + 5 + 594 + 4 = 666.

It is a super-2 number, since 2×1251955944² = 3134787371433862272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1251955944.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 193449 + ... + 199815.

It is an arithmetic number, because the mean of its divisors is an integer number (70676840).

Almost surely, 2^1251955944 is an apocalyptic number.

It is an amenable number.

1251955944 is an abundant number, since it is smaller than the sum of its proper divisors (2140532376).

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

1251955944 is a wasteful number, since it uses less digits than its factorization.

1251955944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9110 (or 9103 counting only the distinct ones).

The product of its digits is 324000, while the sum is 45.

The square root of 1251955944 is about 35382.9894723439. The cubic root of 1251955944 is about 1077.7789126931.

The spelling of 1251955944 in words is "one billion, two hundred fifty-one million, nine hundred fifty-five thousand, nine hundred forty-four".