125021577 has 12 divisors (see below), whose sum is σ = 175587440. Its totient is φ = 78907680.

The previous prime is 125021563. The next prime is 125021599. The reversal of 125021577 is 775120521.

It is not a de Polignac number, because 125021577 - 2²³ = 116632969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125021527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83677 + ... + 85157.

Almost surely, 2^125021577 is an apocalyptic number.

It is an amenable number.

125021577 is a deficient number, since it is larger than the sum of its proper divisors (50565863).

125021577 is an frugal number, since it uses more digits than its factorization.

125021577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2984 (or 1503 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 30.

The square root of 125021577 is about 11181.3047986360. The cubic root of 125021577 is about 500.0287676781.

The spelling of 125021577 in words is "one hundred twenty-five million, twenty-one thousand, five hundred seventy-seven".