621924 has 12 divisors (see below), whose sum is σ = 1451184. Its totient is φ = 207304.

The previous prime is 621923. The next prime is 621937. The reversal of 621924 is 429126.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 621894 and 621903.

It is not an unprimeable number, because it can be changed into a prime (621923) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 25902 + ... + 25925.

It is an arithmetic number, because the mean of its divisors is an integer number (120932).

2⁶²¹⁹²⁴ is an apocalyptic number.

It is an amenable number.

621924 is an abundant number, since it is smaller than the sum of its proper divisors (829260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621924 is a wasteful number, since it uses less digits than its factorization.

621924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51834 (or 51832 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 621924 is about 788.6215822560. The cubic root of 621924 is about 85.3583029685.

The spelling of 621924 in words is "six hundred twenty-one thousand, nine hundred twenty-four".