125176561 has 4 divisors (see below), whose sum is σ = 125489124. Its totient is φ = 124864000.

The previous prime is 125176553. The next prime is 125176573. The reversal of 125176561 is 165671521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 122434225 + 2742336 = 11065^2 + 1656^2 .

It is a cyclic number.

It is not a de Polignac number, because 125176561 - 2³ = 125176553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125176061) 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, 155680 + ... + 156481.

It is an arithmetic number, because the mean of its divisors is an integer number (31372281).

Almost surely, 2^125176561 is an apocalyptic number.

It is an amenable number.

125176561 is a deficient number, since it is larger than the sum of its proper divisors (312563).

125176561 is an equidigital number, since it uses as much as digits as its factorization.

125176561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312562.

The product of its digits is 12600, while the sum is 34.

The square root of 125176561 is about 11188.2331491617. The cubic root of 125176561 is about 500.2353039134.

The spelling of 125176561 in words is "one hundred twenty-five million, one hundred seventy-six thousand, five hundred sixty-one".