621054205 has 8 divisors (see below), whose sum is σ = 752103000. Its totient is φ = 492284736.

The previous prime is 621054199. The next prime is 621054233. The reversal of 621054205 is 502450126.

It can be written as a sum of positive squares in 4 ways, for example, as 203832729 + 417221476 = 14277^2 + 20426^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 621054205 - 2⁵ = 621054173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 621054205.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 569230 + ... + 570319.

It is an arithmetic number, because the mean of its divisors is an integer number (94012875).

Almost surely, 2^621054205 is an apocalyptic number.

It is an amenable number.

621054205 is a deficient number, since it is larger than the sum of its proper divisors (131048795).

621054205 is a wasteful number, since it uses less digits than its factorization.

621054205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139663.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 621054205 is about 24920.9591508834. The cubic root of 621054205 is about 853.1849163910.

The spelling of 621054205 in words is "six hundred twenty-one million, fifty-four thousand, two hundred five".