1251262625 has 8 divisors (see below), whose sum is σ = 1561575912. Its totient is φ = 1001010000.

The previous prime is 1251262609. The next prime is 1251262631. The reversal of 1251262625 is 5262621521.

It can be written as a sum of positive squares in 4 ways, for example, as 188567824 + 1062694801 = 13732^2 + 32599^2 .

It is not a de Polignac number, because 1251262625 - 2⁴ = 1251262609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1251262591 and 1251262600.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5004926 + ... + 5005175.

It is an arithmetic number, because the mean of its divisors is an integer number (195196989).

Almost surely, 2^1251262625 is an apocalyptic number.

It is an amenable number.

1251262625 is a deficient number, since it is larger than the sum of its proper divisors (310313287).

1251262625 is an equidigital number, since it uses as much as digits as its factorization.

1251262625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10010116 (or 10010106 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 1251262625 is about 35373.1907664548. The cubic root of 1251262625 is about 1077.5799220437.

The spelling of 1251262625 in words is "one billion, two hundred fifty-one million, two hundred sixty-two thousand, six hundred twenty-five".