125305557 has 36 divisors (see below), whose sum is σ = 186624864. Its totient is φ = 74736480.

The previous prime is 125305519. The next prime is 125305559. The reversal of 125305557 is 755503521.

It is not a de Polignac number, because 125305557 - 2⁶ = 125305493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125305559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1764832 + ... + 1764902.

It is an arithmetic number, because the mean of its divisors is an integer number (5184024).

Almost surely, 2^125305557 is an apocalyptic number.

It is an amenable number.

125305557 is a deficient number, since it is larger than the sum of its proper divisors (61319307).

125305557 is an equidigital number, since it uses as much as digits as its factorization.

125305557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 33.

The square root of 125305557 is about 11193.9964713234. The cubic root of 125305557 is about 500.4070778187.

The spelling of 125305557 in words is "one hundred twenty-five million, three hundred five thousand, five hundred fifty-seven".