124085921 has 2 divisors, whose sum is σ = 124085922. Its totient is φ = 124085920.

The previous prime is 124085893. The next prime is 124085933. The reversal of 124085921 is 129580421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64240225 + 59845696 = 8015^2 + 7736^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124085921 is a prime.

It is not a weakly prime, because it can be changed into another prime (124085971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62042960 + 62042961.

It is an arithmetic number, because the mean of its divisors is an integer number (62042961).

Almost surely, 2^124085921 is an apocalyptic number.

It is an amenable number.

124085921 is a deficient number, since it is larger than the sum of its proper divisors (1).

124085921 is an equidigital number, since it uses as much as digits as its factorization.

124085921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 124085921 is about 11139.3860243732. The cubic root of 124085921 is about 498.7782450613.

The spelling of 124085921 in words is "one hundred twenty-four million, eighty-five thousand, nine hundred twenty-one".