722569 has 4 divisors (see below), whose sum is σ = 726400. Its totient is φ = 718740.

The previous prime is 722563. The next prime is 722581. The reversal of 722569 is 965227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 722569 - 2⁵ = 722537 is a prime.

It is a super-2 number, since 2×722569² = 1044211919522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 722569.

It is not an unprimeable number, because it can be changed into a prime (722563) 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, 1617 + ... + 2014.

It is an arithmetic number, because the mean of its divisors is an integer number (181600).

2⁷²²⁵⁶⁹ is an apocalyptic number.

It is an amenable number.

722569 is a deficient number, since it is larger than the sum of its proper divisors (3831).

722569 is a wasteful number, since it uses less digits than its factorization.

722569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3830.

The product of its digits is 7560, while the sum is 31.

The square root of 722569 is about 850.0405872663. The cubic root of 722569 is about 89.7345677384.

The spelling of 722569 in words is "seven hundred twenty-two thousand, five hundred sixty-nine".