1251251388875 has 32 divisors (see below), whose sum is σ = 1654149579264. Its totient is φ = 941702016000.

The previous prime is 1251251388869. The next prime is 1251251388901. The reversal of 1251251388875 is 5788831521521.

It is not a de Polignac number, because 1251251388875 - 2¹⁶ = 1251251323339 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1251251388875.

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 31 ways as a sum of consecutive naturals, for example, 4718054 + ... + 4976196.

It is an arithmetic number, because the mean of its divisors is an integer number (51692174352).

Almost surely, 2^{1251251388875} is an apocalyptic number.

1251251388875 is a deficient number, since it is larger than the sum of its proper divisors (402898190389).

1251251388875 is a wasteful number, since it uses less digits than its factorization.

1251251388875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260456 (or 260446 counting only the distinct ones).

The product of its digits is 5376000, while the sum is 56.

The spelling of 1251251388875 in words is "one trillion, two hundred fifty-one billion, two hundred fifty-one million, three hundred eighty-eight thousand, eight hundred seventy-five".