621285 has 32 divisors (see below), whose sum is σ = 1166592. Its totient is φ = 276480.

The previous prime is 621259. The next prime is 621289. The reversal of 621285 is 582126.

It is not a de Polignac number, because 621285 - 2⁸ = 621029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621289) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6357 + ... + 6453.

It is an arithmetic number, because the mean of its divisors is an integer number (36456).

2⁶²¹²⁸⁵ is an apocalyptic number.

It is an amenable number.

621285 is a deficient number, since it is larger than the sum of its proper divisors (545307).

621285 is a wasteful number, since it uses less digits than its factorization.

621285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173.

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

The square root of 621285 is about 788.2163408608. The cubic root of 621285 is about 85.3290589629.

The spelling of 621285 in words is "six hundred twenty-one thousand, two hundred eighty-five".