621205012 has 12 divisors (see below), whose sum is σ = 1087794036. Its totient is φ = 310406720.

The previous prime is 621205009. The next prime is 621205021. The reversal of 621205012 is 210502126.

It can be written as a sum of positive squares in 2 ways, for example, as 336135556 + 285069456 = 18334^2 + 16884^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41689 + ... + 54592.

It is an arithmetic number, because the mean of its divisors is an integer number (90649503).

Almost surely, 2^621205012 is an apocalyptic number.

It is an amenable number.

621205012 is a deficient number, since it is larger than the sum of its proper divisors (466589024).

621205012 is a wasteful number, since it uses less digits than its factorization.

621205012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97898 (or 97896 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 621205012 is about 24923.9846734024. The cubic root of 621205012 is about 853.2539687881.

Adding to 621205012 its reverse (210502126), we get a palindrome (831707138).

The spelling of 621205012 in words is "six hundred twenty-one million, two hundred five thousand, twelve".