125134561 has 4 divisors (see below), whose sum is σ = 125261824. Its totient is φ = 125007300.

The previous prime is 125134553. The next prime is 125134573. The reversal of 125134561 is 165431521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125134561 - 2³ = 125134553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125134591) 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, 62145 + ... + 64126.

It is an arithmetic number, because the mean of its divisors is an integer number (31315456).

Almost surely, 2^125134561 is an apocalyptic number.

It is an amenable number.

125134561 is a deficient number, since it is larger than the sum of its proper divisors (127263).

125134561 is an equidigital number, since it uses as much as digits as its factorization.

125134561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127262.

The product of its digits is 3600, while the sum is 28.

The square root of 125134561 is about 11186.3560197233. The cubic root of 125134561 is about 500.1793503259.

The spelling of 125134561 in words is "one hundred twenty-five million, one hundred thirty-four thousand, five hundred sixty-one".