1251106625 has 8 divisors (see below), whose sum is σ = 1561381224. Its totient is φ = 1000885200.

The previous prime is 1251106609. The next prime is 1251106639. The reversal of 1251106625 is 5266011521.

It is a happy number.

1251106625 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 26946481 + 1224160144 = 5191^2 + 34988^2 .

It is not a de Polignac number, because 1251106625 - 2⁴ = 1251106609 is a prime.

It is a Duffinian 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, 5004302 + ... + 5004551.

It is an arithmetic number, because the mean of its divisors is an integer number (195172653).

Almost surely, 2^1251106625 is an apocalyptic number.

It is an amenable number.

1251106625 is a deficient number, since it is larger than the sum of its proper divisors (310274599).

1251106625 is an equidigital number, since it uses as much as digits as its factorization.

1251106625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10008868 (or 10008858 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1251106625 is about 35370.9856379491. The cubic root of 1251106625 is about 1077.5351380922.

The spelling of 1251106625 in words is "one billion, two hundred fifty-one million, one hundred six thousand, six hundred twenty-five".