125161521 has 16 divisors (see below), whose sum is σ = 168571200. Its totient is φ = 82601280.

The previous prime is 125161513. The next prime is 125161529.

125161521 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (125161513) and next prime (125161529).

It is not a de Polignac number, because 125161521 - 2³ = 125161513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125161491 and 125161500.

It is not an unprimeable number, because it can be changed into a prime (125161529) 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, 180786 + ... + 181476.

It is an arithmetic number, because the mean of its divisors is an integer number (10535700).

Almost surely, 2^125161521 is an apocalyptic number.

It is an amenable number.

125161521 is a deficient number, since it is larger than the sum of its proper divisors (43409679).

125161521 is a wasteful number, since it uses less digits than its factorization.

125161521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216.

The product of its digits is 600, while the sum is 24.

The square root of 125161521 is about 11187.5609942471. The cubic root of 125161521 is about 500.2152686389.

The spelling of 125161521 in words is "one hundred twenty-five million, one hundred sixty-one thousand, five hundred twenty-one".