621613025 has 48 divisors (see below), whose sum is σ = 890419200. Its totient is φ = 425736000.

The previous prime is 621613021. The next prime is 621613039. The reversal of 621613025 is 520316126.

It is not a de Polignac number, because 621613025 - 2² = 621613021 is a prime.

621613025 is a Rhonda number in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 621612985 and 621613003.

It is not an unprimeable number, because it can be changed into a prime (621613021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1415756 + ... + 1416194.

It is an arithmetic number, because the mean of its divisors is an integer number (18550400).

Almost surely, 2^621613025 is an apocalyptic number.

It is an amenable number.

621613025 is a deficient number, since it is larger than the sum of its proper divisors (268806175).

621613025 is a wasteful number, since it uses less digits than its factorization.

621613025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750 (or 745 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 621613025 is about 24932.1684776916. The cubic root of 621613025 is about 853.4407361796.

The spelling of 621613025 in words is "six hundred twenty-one million, six hundred thirteen thousand, twenty-five".