124275521 has 2 divisors, whose sum is σ = 124275522. Its totient is φ = 124275520.

The previous prime is 124275517. The next prime is 124275539. The reversal of 124275521 is 125572421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123988225 + 287296 = 11135^2 + 536^2 .

It is a cyclic number.

It is not a de Polignac number, because 124275521 - 2² = 124275517 is a prime.

It is not a weakly prime, because it can be changed into another prime (124275511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62137760 + 62137761.

It is an arithmetic number, because the mean of its divisors is an integer number (62137761).

Almost surely, 2^124275521 is an apocalyptic number.

It is an amenable number.

124275521 is a deficient number, since it is larger than the sum of its proper divisors (1).

124275521 is an equidigital number, since it uses as much as digits as its factorization.

124275521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5600, while the sum is 29.

The square root of 124275521 is about 11147.8931193298. The cubic root of 124275521 is about 499.0321557639.

The spelling of 124275521 in words is "one hundred twenty-four million, two hundred seventy-five thousand, five hundred twenty-one".