620875 has 8 divisors (see below), whose sum is σ = 775008. Its totient is φ = 496600.

The previous prime is 620869. The next prime is 620887. The reversal of 620875 is 578026.

It is not a de Polignac number, because 620875 - 2⁹ = 620363 is a prime.

It is a Duffinian number.

620875 is a lucky number.

It is an unprimeable number.

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, 2359 + ... + 2608.

It is an arithmetic number, because the mean of its divisors is an integer number (96876).

2⁶²⁰⁸⁷⁵ is an apocalyptic number.

620875 is a deficient number, since it is larger than the sum of its proper divisors (154133).

620875 is an equidigital number, since it uses as much as digits as its factorization.

620875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4982 (or 4972 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 620875 is about 787.9562170578. The cubic root of 620875 is about 85.3102846415.

Subtracting from 620875 its reverse (578026), we obtain a square (42849 = 207²).

It can be divided in two parts, 6 and 20875, that multiplied together give a triangular number (125250 = T₅₀₀).

The spelling of 620875 in words is "six hundred twenty thousand, eight hundred seventy-five".