125541657 has 10 divisors (see below), whose sum is σ = 187537658. Its totient is φ = 83694384.

The previous prime is 125541649. The next prime is 125541671. The reversal of 125541657 is 756145521.

It can be written as a sum of positive squares in only one way, i.e., 123743376 + 1798281 = 11124^2 + 1341^2 .

It is not a de Polignac number, because 125541657 - 2³ = 125541649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125541697) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 774868 + ... + 775029.

Almost surely, 2^125541657 is an apocalyptic number.

It is an amenable number.

125541657 is a deficient number, since it is larger than the sum of its proper divisors (61996001).

125541657 is an equidigital number, since it uses as much as digits as its factorization.

125541657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1549909 (or 1549900 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 125541657 is about 11204.5373398459. The cubic root of 125541657 is about 500.7211686648.

The spelling of 125541657 in words is "one hundred twenty-five million, five hundred forty-one thousand, six hundred fifty-seven".