125686625 has 8 divisors (see below), whose sum is σ = 156857064. Its totient is φ = 100549200.

The previous prime is 125686619. The next prime is 125686637. The reversal of 125686625 is 526686521.

It can be written as a sum of positive squares in 4 ways, for example, as 44944 + 125641681 = 212^2 + 11209^2 .

It is not a de Polignac number, because 125686625 - 2¹⁰ = 125685601 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 502622 + ... + 502871.

It is an arithmetic number, because the mean of its divisors is an integer number (19607133).

Almost surely, 2^125686625 is an apocalyptic number.

It is an amenable number.

125686625 is a deficient number, since it is larger than the sum of its proper divisors (31170439).

125686625 is an equidigital number, since it uses as much as digits as its factorization.

125686625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005508 (or 1005498 counting only the distinct ones).

The product of its digits is 172800, while the sum is 41.

The square root of 125686625 is about 11211.0046383007. The cubic root of 125686625 is about 500.9138288163.

The spelling of 125686625 in words is "one hundred twenty-five million, six hundred eighty-six thousand, six hundred twenty-five".