621485225 has 12 divisors (see below), whose sum is σ = 797216460. Its totient is φ = 480043200.

The previous prime is 621485209. The next prime is 621485237. The reversal of 621485225 is 522584126.

It can be written as a sum of positive squares in 6 ways, for example, as 142181776 + 479303449 = 11924^2 + 21893^2 .

It is not a de Polignac number, because 621485225 - 2⁴ = 621485209 is a prime.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 427886 + ... + 429335.

It is an arithmetic number, because the mean of its divisors is an integer number (66434705).

Almost surely, 2^621485225 is an apocalyptic number.

It is an amenable number.

621485225 is a deficient number, since it is larger than the sum of its proper divisors (175731235).

621485225 is a wasteful number, since it uses less digits than its factorization.

621485225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857260 (or 857255 counting only the distinct ones).

The product of its digits is 38400, while the sum is 35.

The square root of 621485225 is about 24929.6053919832. The cubic root of 621485225 is about 853.3822446974.

The spelling of 621485225 in words is "six hundred twenty-one million, four hundred eighty-five thousand, two hundred twenty-five".