622565 has 4 divisors (see below), whose sum is σ = 747084. Its totient is φ = 498048.

The previous prime is 622561. The next prime is 622571. The reversal of 622565 is 565226.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66049 + 556516 = 257^2 + 746^2 .

It is a cyclic number.

It is not a de Polignac number, because 622565 - 2² = 622561 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62252 + ... + 62261.

It is an arithmetic number, because the mean of its divisors is an integer number (186771).

2⁶²²⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

622565 is a deficient number, since it is larger than the sum of its proper divisors (124519).

622565 is a wasteful number, since it uses less digits than its factorization.

622565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124518.

The product of its digits is 3600, while the sum is 26.

The square root of 622565 is about 789.0278829040. The cubic root of 622565 is about 85.3876183861.

The spelling of 622565 in words is "six hundred twenty-two thousand, five hundred sixty-five".