621450052 has 12 divisors (see below), whose sum is σ = 1093614480. Its totient is φ = 308988776.

The previous prime is 621450047. The next prime is 621450059. The reversal of 621450052 is 250054126.

It is a junction number, because it is equal to n+sod(n) for n = 621449999 and 621450026.

It is not an unprimeable number, because it can be changed into a prime (621450059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433258 + ... + 434689.

It is an arithmetic number, because the mean of its divisors is an integer number (91134540).

Almost surely, 2^621450052 is an apocalyptic number.

It is an amenable number.

621450052 is a deficient number, since it is larger than the sum of its proper divisors (472164428).

621450052 is a wasteful number, since it uses less digits than its factorization.

621450052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868130 (or 868128 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 621450052 is about 24928.8999356169. The cubic root of 621450052 is about 853.3661453176.

The spelling of 621450052 in words is "six hundred twenty-one million, four hundred fifty thousand, fifty-two".