22542745 has 4 divisors (see below), whose sum is σ = 27051300. Its totient is φ = 18034192.

The previous prime is 22542739. The next prime is 22542757. The reversal of 22542745 is 54724522.

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 3463321 + 19079424 = 1861^2 + 4368^2 .

It is a cyclic number.

It is not a de Polignac number, because 22542745 - 2¹⁷ = 22411673 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2254270 + ... + 2254279.

It is an arithmetic number, because the mean of its divisors is an integer number (6762825).

Almost surely, 2^22542745 is an apocalyptic number.

It is an amenable number.

22542745 is a deficient number, since it is larger than the sum of its proper divisors (4508555).

22542745 is an equidigital number, since it uses as much as digits as its factorization.

22542745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4508554.

The product of its digits is 22400, while the sum is 31.

The square root of 22542745 is about 4747.9200709363. The cubic root of 22542745 is about 282.4894715057.

The spelling of 22542745 in words is "twenty-two million, five hundred forty-two thousand, seven hundred forty-five".