1251244056 has 32 divisors (see below), whose sum is σ = 3144499200. Its totient is φ = 414896160.

The previous prime is 1251244037. The next prime is 1251244061. The reversal of 1251244056 is 6504421521.

It is a super-2 number, since 2×1251244056² = 3131223375350662272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131896 + ... + 141063.

It is an arithmetic number, because the mean of its divisors is an integer number (98265600).

Almost surely, 2^1251244056 is an apocalyptic number.

It is an amenable number.

1251244056 is an abundant number, since it is smaller than the sum of its proper divisors (1893255144).

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

1251244056 is a wasteful number, since it uses less digits than its factorization.

1251244056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273159 (or 273155 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 1251244056 is about 35372.9282926930. The cubic root of 1251244056 is about 1077.5745915133.

Adding to 1251244056 its reverse (6504421521), we get a palindrome (7755665577).

The spelling of 1251244056 in words is "one billion, two hundred fifty-one million, two hundred forty-four thousand, fifty-six".