124636221 has 12 divisors (see below), whose sum is σ = 180155872. Its totient is φ = 83032776.

The previous prime is 124636217. The next prime is 124636247. The reversal of 124636221 is 122636421.

124636221 is a `hidden beast` number, since 1 + 2 + 4 + 636 + 2 + 21 = 666.

It is not a de Polignac number, because 124636221 - 2² = 124636217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124636271) 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, 11760 + ... + 19686.

Almost surely, 2^124636221 is an apocalyptic number.

It is an amenable number.

124636221 is a deficient number, since it is larger than the sum of its proper divisors (55519651).

124636221 is a wasteful number, since it uses less digits than its factorization.

124636221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9680 (or 9677 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 124636221 is about 11164.0593423718. The cubic root of 124636221 is about 499.5144900461.

The spelling of 124636221 in words is "one hundred twenty-four million, six hundred thirty-six thousand, two hundred twenty-one".