621922 has 16 divisors (see below), whose sum is σ = 1101312. Its totient is φ = 257760.

The previous prime is 621913. The next prime is 621923. The reversal of 621922 is 229126.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 621893 and 621902.

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 7 ways as a sum of consecutive naturals, for example, 283 + ... + 1150.

It is an arithmetic number, because the mean of its divisors is an integer number (68832).

2⁶²¹⁹²² is an apocalyptic number.

621922 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

621922 is a deficient number, since it is larger than the sum of its proper divisors (479390).

621922 is a wasteful number, since it uses less digits than its factorization.

621922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473.

The product of its digits is 432, while the sum is 22.

The square root of 621922 is about 788.6203142197. The cubic root of 621922 is about 85.3582114692.

It can be divided in two parts, 6219 and 22, that added together give a square (6241 = 79²).

The spelling of 621922 in words is "six hundred twenty-one thousand, nine hundred twenty-two".