125376021 has 6 divisors (see below), whose sum is σ = 181098710. Its totient is φ = 83584008.

The previous prime is 125376011. The next prime is 125376101. The reversal of 125376021 is 120673521.

It is a happy number.

125376021 is a `hidden beast` number, since 1 + 2 + 53 + 7 + 602 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 108680625 + 16695396 = 10425^2 + 4086^2 .

It is not a de Polignac number, because 125376021 - 2¹³ = 125367829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125376001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6965326 + ... + 6965343.

Almost surely, 2^125376021 is an apocalyptic number.

It is an amenable number.

125376021 is a deficient number, since it is larger than the sum of its proper divisors (55722689).

125376021 is a wasteful number, since it uses less digits than its factorization.

125376021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13930675 (or 13930672 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 125376021 is about 11197.1434303576. The cubic root of 125376021 is about 500.5008594454.

The spelling of 125376021 in words is "one hundred twenty-five million, three hundred seventy-six thousand, twenty-one".