1251013056 has 168 divisors, whose sum is σ = 3522786960. Its totient is φ = 391716864.

The previous prime is 1251013019. The next prime is 1251013081. The reversal of 1251013056 is 6503101521.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11070856 + ... + 11070968.

It is an arithmetic number, because the mean of its divisors is an integer number (20968970).

Almost surely, 2^1251013056 is an apocalyptic number.

1251013056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1251013056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1761393480).

1251013056 is an abundant number, since it is smaller than the sum of its proper divisors (2271773904).

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

1251013056 is a wasteful number, since it uses less digits than its factorization.

1251013056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 1251013056 is about 35369.6629330843. The cubic root of 1251013056 is about 1077.5082748345.

Adding to 1251013056 its reverse (6503101521), we get a palindrome (7754114577).

The spelling of 1251013056 in words is "one billion, two hundred fifty-one million, thirteen thousand, fifty-six".