621257052 has 24 divisors (see below), whose sum is σ = 1561107856. Its totient is φ = 191155968.

The previous prime is 621257011. The next prime is 621257057. The reversal of 621257052 is 250752126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621257057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1991053 + ... + 1991364.

Almost surely, 2^621257052 is an apocalyptic number.

It is an amenable number.

621257052 is an abundant number, since it is smaller than the sum of its proper divisors (939850804).

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

621257052 is a wasteful number, since it uses less digits than its factorization.

621257052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3982437 (or 3982435 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 621257052 is about 24925.0286258612. The cubic root of 621257052 is about 853.2777945760.

The spelling of 621257052 in words is "six hundred twenty-one million, two hundred fifty-seven thousand, fifty-two".