621912 has 16 divisors (see below), whose sum is σ = 1554840. Its totient is φ = 207296.

The previous prime is 621893. The next prime is 621913. The reversal of 621912 is 219126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621913) 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, 12933 + ... + 12980.

2⁶²¹⁹¹² is an apocalyptic number.

It is an amenable number.

621912 is an abundant number, since it is smaller than the sum of its proper divisors (932928).

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

621912 is a wasteful number, since it uses less digits than its factorization.

621912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25922 (or 25918 counting only the distinct ones).

The product of its digits is 216, while the sum is 21.

The square root of 621912 is about 788.6139740076. The cubic root of 621912 is about 85.3577539699.

The spelling of 621912 in words is "six hundred twenty-one thousand, nine hundred twelve".