621825 has 12 divisors (see below), whose sum is σ = 1028208. Its totient is φ = 331600.

The previous prime is 621821. The next prime is 621833. The reversal of 621825 is 528126.

It is not a de Polignac number, because 621825 - 2² = 621821 is a prime.

621825 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 621795 and 621804.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 621825.

It is not an unprimeable number, because it can be changed into a prime (621821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4071 + ... + 4220.

It is an arithmetic number, because the mean of its divisors is an integer number (85684).

2⁶²¹⁸²⁵ is an apocalyptic number.

It is an amenable number.

621825 is a deficient number, since it is larger than the sum of its proper divisors (406383).

621825 is a wasteful number, since it uses less digits than its factorization.

621825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8304 (or 8299 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The square root of 621825 is about 788.5588120109. The cubic root of 621825 is about 85.3537735188.

The spelling of 621825 in words is "six hundred twenty-one thousand, eight hundred twenty-five".