22126865 has 4 divisors (see below), whose sum is σ = 26552244. Its totient is φ = 17701488.

The previous prime is 22126861. The next prime is 22126889. The reversal of 22126865 is 56862122.

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 2262016 + 19864849 = 1504^2 + 4457^2 .

It is a cyclic number.

It is not a de Polignac number, because 22126865 - 2² = 22126861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22126861) 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, 2212682 + ... + 2212691.

It is an arithmetic number, because the mean of its divisors is an integer number (6638061).

Almost surely, 2^22126865 is an apocalyptic number.

It is an amenable number.

22126865 is a deficient number, since it is larger than the sum of its proper divisors (4425379).

22126865 is an equidigital number, since it uses as much as digits as its factorization.

22126865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4425378.

The product of its digits is 11520, while the sum is 32.

The square root of 22126865 is about 4703.9201736424. The cubic root of 22126865 is about 280.7415082116.

Adding to 22126865 its reverse (56862122), we get a palindrome (78988987).

The spelling of 22126865 in words is "twenty-two million, one hundred twenty-six thousand, eight hundred sixty-five".