621164 has 6 divisors (see below), whose sum is σ = 1087044. Its totient is φ = 310580.

The previous prime is 621143. The next prime is 621217. The reversal of 621164 is 461126.

It is a happy number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 621164.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77642 + ... + 77649.

It is an arithmetic number, because the mean of its divisors is an integer number (181174).

2⁶²¹¹⁶⁴ is an apocalyptic number.

It is an amenable number.

621164 is a deficient number, since it is larger than the sum of its proper divisors (465880).

621164 is a wasteful number, since it uses less digits than its factorization.

621164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155295 (or 155293 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 621164 is about 788.1395815463. The cubic root of 621164 is about 85.3235191078.

The spelling of 621164 in words is "six hundred twenty-one thousand, one hundred sixty-four".