620520 has 32 divisors (see below), whose sum is σ = 1861920. Its totient is φ = 165440.

The previous prime is 620519. The next prime is 620531. The reversal of 620520 is 25026.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 620520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2466 + ... + 2705.

It is an arithmetic number, because the mean of its divisors is an integer number (58185).

2⁶²⁰⁵²⁰ is an apocalyptic number.

620520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

620520 is an abundant number, since it is smaller than the sum of its proper divisors (1241400).

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

620520 is a wasteful number, since it uses less digits than its factorization.

620520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5185 (or 5181 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 620520 is about 787.7309185248. The cubic root of 620520 is about 85.2940221491.

Adding to 620520 its reverse (25026), we get a palindrome (645546).

The spelling of 620520 in words is "six hundred twenty thousand, five hundred twenty".