621025951 has 12 divisors (see below), whose sum is σ = 777989352. Its totient is φ = 491360688.

The previous prime is 621025939. The next prime is 621025973. The reversal of 621025951 is 159520126.

It is not a de Polignac number, because 621025951 - 2⁹ = 621025439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621025901) 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 11 ways as a sum of consecutive naturals, for example, 486825 + ... + 488098.

It is an arithmetic number, because the mean of its divisors is an integer number (64832446).

Almost surely, 2^621025951 is an apocalyptic number.

621025951 is a deficient number, since it is larger than the sum of its proper divisors (156963401).

621025951 is a wasteful number, since it uses less digits than its factorization.

621025951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974950 (or 974943 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 621025951 is about 24920.3922721935. The cubic root of 621025951 is about 853.1719780398.

The spelling of 621025951 in words is "six hundred twenty-one million, twenty-five thousand, nine hundred fifty-one".