621320124 has 24 divisors (see below), whose sum is σ = 1450442448. Its totient is φ = 207007360.

The previous prime is 621320123. The next prime is 621320149. The reversal of 621320124 is 421023126.

It is a self number, because there is not a number n which added to its sum of digits gives 621320124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621320123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16294 + ... + 38834.

It is an arithmetic number, because the mean of its divisors is an integer number (60435102).

Almost surely, 2^621320124 is an apocalyptic number.

It is an amenable number.

621320124 is an abundant number, since it is smaller than the sum of its proper divisors (829122324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621320124 is a wasteful number, since it uses less digits than its factorization.

621320124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24845 (or 24843 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 621320124 is about 24926.2938280042. The cubic root of 621320124 is about 853.3066694278.

The spelling of 621320124 in words is "six hundred twenty-one million, three hundred twenty thousand, one hundred twenty-four".