124516621 has 4 divisors (see below), whose sum is σ = 125618652. Its totient is φ = 123414592.

The previous prime is 124516571. The next prime is 124516723. The reversal of 124516621 is 126615421.

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 49070025 + 75446596 = 7005^2 + 8686^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124516621 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 124516621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124516421) 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 3 ways as a sum of consecutive naturals, for example, 550846 + ... + 551071.

It is an arithmetic number, because the mean of its divisors is an integer number (31404663).

Almost surely, 2^124516621 is an apocalyptic number.

It is an amenable number.

124516621 is a deficient number, since it is larger than the sum of its proper divisors (1102031).

124516621 is a wasteful number, since it uses less digits than its factorization.

124516621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102030.

The product of its digits is 2880, while the sum is 28.

The square root of 124516621 is about 11158.7015821734. The cubic root of 124516621 is about 499.3546621030.

The spelling of 124516621 in words is "one hundred twenty-four million, five hundred sixteen thousand, six hundred twenty-one".