125020591 has 4 divisors (see below), whose sum is σ = 125101152. Its totient is φ = 124940032.

The previous prime is 125020579. The next prime is 125020607. The reversal of 125020591 is 195020521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125020591 - 2⁵ = 125020559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125020541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37906 + ... + 41071.

It is an arithmetic number, because the mean of its divisors is an integer number (31275288).

Almost surely, 2^125020591 is an apocalyptic number.

125020591 is a deficient number, since it is larger than the sum of its proper divisors (80561).

125020591 is an equidigital number, since it uses as much as digits as its factorization.

125020591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80560.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 125020591 is about 11181.2607070938. The cubic root of 125020591 is about 500.0274531593.

The spelling of 125020591 in words is "one hundred twenty-five million, twenty thousand, five hundred ninety-one".