1251854972 has 12 divisors (see below), whose sum is σ = 2210845560. Its totient is φ = 620184816.

The previous prime is 1251854969. The next prime is 1251854999. The reversal of 1251854972 is 2794581521.

It is a super-2 number, since 2×1251854972² = 3134281741842241568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1435178 + ... + 1436049.

It is an arithmetic number, because the mean of its divisors is an integer number (184237130).

Almost surely, 2^1251854972 is an apocalyptic number.

It is an amenable number.

1251854972 is a deficient number, since it is larger than the sum of its proper divisors (958990588).

1251854972 is a wasteful number, since it uses less digits than its factorization.

1251854972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871340 (or 2871338 counting only the distinct ones).

The product of its digits is 201600, while the sum is 44.

The square root of 1251854972 is about 35381.5625997496. The cubic root of 1251854972 is about 1077.7499371213.

The spelling of 1251854972 in words is "one billion, two hundred fifty-one million, eight hundred fifty-four thousand, nine hundred seventy-two".