125160021 has 24 divisors (see below), whose sum is σ = 206915904. Its totient is φ = 71415360.

The previous prime is 125160019. The next prime is 125160031. The reversal of 125160021 is 120061521.

125160021 is a `hidden beast` number, since 12 + 51 + 600 + 2 + 1 = 666.

It is not a de Polignac number, because 125160021 - 2¹ = 125160019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125159976 and 125160003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125160031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68206 + ... + 70016.

It is an arithmetic number, because the mean of its divisors is an integer number (8621496).

Almost surely, 2^125160021 is an apocalyptic number.

It is an amenable number.

125160021 is a deficient number, since it is larger than the sum of its proper divisors (81755883).

125160021 is a wasteful number, since it uses less digits than its factorization.

125160021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2921 (or 2918 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 125160021 is about 11187.4939553056. The cubic root of 125160021 is about 500.2132703519.

The spelling of 125160021 in words is "one hundred twenty-five million, one hundred sixty thousand, twenty-one".