125263921 has 2 divisors, whose sum is σ = 125263922. Its totient is φ = 125263920.

The previous prime is 125263891. The next prime is 125263949. The reversal of 125263921 is 129362521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88830625 + 36433296 = 9425^2 + 6036^2 .

It is a cyclic number.

It is not a de Polignac number, because 125263921 - 2¹³ = 125255729 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125263961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62631960 + 62631961.

It is an arithmetic number, because the mean of its divisors is an integer number (62631961).

Almost surely, 2^125263921 is an apocalyptic number.

It is an amenable number.

125263921 is a deficient number, since it is larger than the sum of its proper divisors (1).

125263921 is an equidigital number, since it uses as much as digits as its factorization.

125263921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 31.

The square root of 125263921 is about 11192.1365699316. The cubic root of 125263921 is about 500.3516472970.

The spelling of 125263921 in words is "one hundred twenty-five million, two hundred sixty-three thousand, nine hundred twenty-one".