125572161 has 16 divisors (see below), whose sum is σ = 196701120. Its totient is φ = 70249920.

The previous prime is 125572129. The next prime is 125572163. The reversal of 125572161 is 161275521.

It is not a de Polignac number, because 125572161 - 2⁵ = 125572129 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125572163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145926 + ... + 146783.

It is an arithmetic number, because the mean of its divisors is an integer number (12293820).

Almost surely, 2^125572161 is an apocalyptic number.

125572161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125572161 is a deficient number, since it is larger than the sum of its proper divisors (71128959).

125572161 is a wasteful number, since it uses less digits than its factorization.

125572161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292736.

The product of its digits is 4200, while the sum is 30.

The square root of 125572161 is about 11205.8984914196. The cubic root of 125572161 is about 500.7617203084.

The spelling of 125572161 in words is "one hundred twenty-five million, five hundred seventy-two thousand, one hundred sixty-one".