22945 has 8 divisors (see below), whose sum is σ = 29736. Its totient is φ = 16896.

The previous prime is 22943. The next prime is 22961. The reversal of 22945 is 54922.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 144 + 22801 = 12^2 + 151^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22945 - 2¹ = 22943 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112 + ... + 241.

It is an arithmetic number, because the mean of its divisors is an integer number (3717).

2²²⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

22945 is a deficient number, since it is larger than the sum of its proper divisors (6791).

22945 is a wasteful number, since it uses less digits than its factorization.

22945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371.

The product of its digits is 720, while the sum is 22.

The square root of 22945 is about 151.4760707175. The cubic root of 22945 is about 28.4159832005.

The spelling of 22945 in words is "twenty-two thousand, nine hundred forty-five".