124613921 has 2 divisors, whose sum is σ = 124613922. Its totient is φ = 124613920.

The previous prime is 124613869. The next prime is 124613947. The reversal of 124613921 is 129316421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66259600 + 58354321 = 8140^2 + 7639^2 .

It is a cyclic number.

It is not a de Polignac number, because 124613921 - 2²² = 120419617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (124613821) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62306960 + 62306961.

It is an arithmetic number, because the mean of its divisors is an integer number (62306961).

Almost surely, 2^124613921 is an apocalyptic number.

It is an amenable number.

124613921 is a deficient number, since it is larger than the sum of its proper divisors (1).

124613921 is an equidigital number, since it uses as much as digits as its factorization.

124613921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 29.

The square root of 124613921 is about 11163.0605570336. The cubic root of 124613921 is about 499.4846971083.

The spelling of 124613921 in words is "one hundred twenty-four million, six hundred thirteen thousand, nine hundred twenty-one".