22245 has 8 divisors (see below), whose sum is σ = 35616. Its totient is φ = 11856.

The previous prime is 22229. The next prime is 22247. The reversal of 22245 is 54222.

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

It is not a de Polignac number, because 22245 - 2⁴ = 22229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 1483 = 22245 / (2 + 2 + 2 + 4 + 5).

It is a Curzon number.

It is a plaindrome in base 9 and base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 727 + ... + 756.

It is an arithmetic number, because the mean of its divisors is an integer number (4452).

2²²²⁴⁵ is an apocalyptic number.

It is an amenable number.

22245 is a deficient number, since it is larger than the sum of its proper divisors (13371).

22245 is a wasteful number, since it uses less digits than its factorization.

22245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491.

The product of its digits is 160, while the sum is 15.

The square root of 22245 is about 149.1475779220. The cubic root of 22245 is about 28.1240246575.

Adding to 22245 its reverse (54222), we get a palindrome (76467).

The spelling of 22245 in words is "twenty-two thousand, two hundred forty-five".