124255521 has 12 divisors (see below), whose sum is σ = 193286548. Its totient is φ = 76464864.

The previous prime is 124255511. The next prime is 124255559. The reversal of 124255521 is 125552421.

It can be written as a sum of positive squares in 2 ways, for example, as 22467600 + 101787921 = 4740^2 + 10089^2 .

It is not a de Polignac number, because 124255521 - 2⁵ = 124255489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (124255501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 530890 + ... + 531123.

Almost surely, 2^124255521 is an apocalyptic number.

It is an amenable number.

124255521 is a deficient number, since it is larger than the sum of its proper divisors (69031027).

124255521 is a wasteful number, since it uses less digits than its factorization.

124255521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062032 (or 1062029 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 124255521 is about 11146.9960527489. The cubic root of 124255521 is about 499.0053841238.

The spelling of 124255521 in words is "one hundred twenty-four million, two hundred fifty-five thousand, five hundred twenty-one".