621101424 has 20 divisors (see below), whose sum is σ = 1604512136. Its totient is φ = 207033792.

The previous prime is 621101423. The next prime is 621101441. The reversal of 621101424 is 424101126.

It is a happy number.

It is a zygodrome in base 5.

It is a self number, because there is not a number n which added to its sum of digits gives 621101424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621101423) 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, 6469759 + ... + 6469854.

Almost surely, 2^621101424 is an apocalyptic number.

It is an amenable number.

621101424 is an abundant number, since it is smaller than the sum of its proper divisors (983410712).

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

621101424 is a wasteful number, since it uses less digits than its factorization.

621101424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12939624 (or 12939618 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 621101424 is about 24921.9065081306. The cubic root of 621101424 is about 853.2065385067.

The spelling of 621101424 in words is "six hundred twenty-one million, one hundred one thousand, four hundred twenty-four".