125025521 has 2 divisors, whose sum is σ = 125025522. Its totient is φ = 125025520.

The previous prime is 125025517. The next prime is 125025547. The reversal of 125025521 is 125520521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124634896 + 390625 = 11164^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 125025521 - 2² = 125025517 is a prime.

It is not a weakly prime, because it can be changed into another prime (125028521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62512760 + 62512761.

It is an arithmetic number, because the mean of its divisors is an integer number (62512761).

Almost surely, 2^125025521 is an apocalyptic number.

It is an amenable number.

125025521 is a deficient number, since it is larger than the sum of its proper divisors (1).

125025521 is an equidigital number, since it uses as much as digits as its factorization.

125025521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 125025521 is about 11181.4811630660. The cubic root of 125025521 is about 500.0340256845.

The spelling of 125025521 in words is "one hundred twenty-five million, twenty-five thousand, five hundred twenty-one".