125935921 has 2 divisors, whose sum is σ = 125935922. Its totient is φ = 125935920.

The previous prime is 125935891. The next prime is 125935939. The reversal of 125935921 is 129539521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113720896 + 12215025 = 10664^2 + 3495^2 .

It is a cyclic number.

It is not a de Polignac number, because 125935921 - 2¹⁷ = 125804849 is a prime.

It is not a weakly prime, because it can be changed into another prime (125935961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62967960 + 62967961.

It is an arithmetic number, because the mean of its divisors is an integer number (62967961).

Almost surely, 2^125935921 is an apocalyptic number.

It is an amenable number.

125935921 is a deficient number, since it is larger than the sum of its proper divisors (1).

125935921 is an equidigital number, since it uses as much as digits as its factorization.

125935921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24300, while the sum is 37.

The square root of 125935921 is about 11222.1174918105. The cubic root of 125935921 is about 501.2447930753.

The spelling of 125935921 in words is "one hundred twenty-five million, nine hundred thirty-five thousand, nine hundred twenty-one".