124553521 has 16 divisors (see below), whose sum is σ = 132022800. Its totient is φ = 117331200.

The previous prime is 124553501. The next prime is 124553573. The reversal of 124553521 is 125355421.

It can be written as a sum of positive squares in 8 ways, for example, as 60233121 + 64320400 = 7761^2 + 8020^2 .

It is a cyclic number.

It is not a de Polignac number, because 124553521 - 2⁵ = 124553489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 124553521.

It is not an unprimeable number, because it can be changed into a prime (124553501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 319995 + ... + 320383.

It is an arithmetic number, because the mean of its divisors is an integer number (8251425).

Almost surely, 2^124553521 is an apocalyptic number.

It is an amenable number.

124553521 is a deficient number, since it is larger than the sum of its proper divisors (7469279).

124553521 is a wasteful number, since it uses less digits than its factorization.

124553521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660.

The product of its digits is 6000, while the sum is 28.

The square root of 124553521 is about 11160.3548778701. The cubic root of 124553521 is about 499.4039844800.

The spelling of 124553521 in words is "one hundred twenty-four million, five hundred fifty-three thousand, five hundred twenty-one".