620565 has 16 divisors (see below), whose sum is σ = 1083456. Its totient is φ = 300800.

The previous prime is 620561. The next prime is 620567. The reversal of 620565 is 565026.

620565 is nontrivially palindromic in base 14.

It is not a de Polignac number, because 620565 - 2² = 620561 is a prime.

620565 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1716 + ... + 2045.

It is an arithmetic number, because the mean of its divisors is an integer number (67716).

2⁶²⁰⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

620565 is a deficient number, since it is larger than the sum of its proper divisors (462891).

620565 is a wasteful number, since it uses less digits than its factorization.

620565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3780.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 620565 is about 787.7594810601. The cubic root of 620565 is about 85.2960839350.

The spelling of 620565 in words is "six hundred twenty thousand, five hundred sixty-five".