565000921 has 4 divisors (see below), whose sum is σ = 565181392. Its totient is φ = 564820452.

The previous prime is 565000907. The next prime is 565000949. The reversal of 565000921 is 129000565.

565000921 is nontrivially palindromic in base 7.

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 565000921 - 2²¹ = 562903769 is a prime.

It is a pancake number, because a pancake can be divided into 565000921 parts by 33615 straight cuts.

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 565000921.

It is not an unprimeable number, because it can be changed into a prime (565000421) 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, 85455 + ... + 91828.

It is an arithmetic number, because the mean of its divisors is an integer number (141295348).

Almost surely, 2^565000921 is an apocalyptic number.

It is an amenable number.

565000921 is a deficient number, since it is larger than the sum of its proper divisors (180471).

565000921 is a wasteful number, since it uses less digits than its factorization.

565000921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180470.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 565000921 is about 23769.7480213821. The cubic root of 565000921 is about 826.7033901444.

The spelling of 565000921 in words is "five hundred sixty-five million, nine hundred twenty-one", and thus it is an aban number.