1251851088 has 80 divisors (see below), whose sum is σ = 3317662656. Its totient is φ = 406533120.

The previous prime is 1251851087. The next prime is 1251851099. The reversal of 1251851088 is 8801581521.

It is a super-2 number, since 2×1251851088² = 3134262293053567488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251851087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1570306 + ... + 1571102.

Almost surely, 2^1251851088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1251851088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1658831328).

1251851088 is an abundant number, since it is smaller than the sum of its proper divisors (2065811568).

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

1251851088 is a wasteful number, since it uses less digits than its factorization.

1251851088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612 (or 1606 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 39.

The square root of 1251851088 is about 35381.5077123630. The cubic root of 1251851088 is about 1077.7488225126.

The spelling of 1251851088 in words is "one billion, two hundred fifty-one million, eight hundred fifty-one thousand, eighty-eight".