124718221 has 4 divisors (see below), whose sum is σ = 126762844. Its totient is φ = 122673600.

The previous prime is 124718203. The next prime is 124718249. The reversal of 124718221 is 122817421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15515721 + 109202500 = 3939^2 + 10450^2 .

It is a cyclic number.

It is not a de Polignac number, because 124718221 - 2⁷ = 124718093 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 124718221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124718201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1022220 + ... + 1022341.

It is an arithmetic number, because the mean of its divisors is an integer number (31690711).

Almost surely, 2^124718221 is an apocalyptic number.

It is an amenable number.

124718221 is a deficient number, since it is larger than the sum of its proper divisors (2044623).

124718221 is an equidigital number, since it uses as much as digits as its factorization.

124718221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2044622.

The product of its digits is 1792, while the sum is 28.

The square root of 124718221 is about 11167.7312378119. The cubic root of 124718221 is about 499.6240120036.

The spelling of 124718221 in words is "one hundred twenty-four million, seven hundred eighteen thousand, two hundred twenty-one".