13022645 has 4 divisors (see below), whose sum is σ = 15627180. Its totient is φ = 10418112.

The previous prime is 13022641. The next prime is 13022651. The reversal of 13022645 is 54622031.

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 7828804 + 5193841 = 2798^2 + 2279^2 .

It is a cyclic number.

It is not a de Polignac number, because 13022645 - 2² = 13022641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13022645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13022641) 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, 1302260 + ... + 1302269.

It is an arithmetic number, because the mean of its divisors is an integer number (3906795).

Almost surely, 2^13022645 is an apocalyptic number.

It is an amenable number.

13022645 is a deficient number, since it is larger than the sum of its proper divisors (2604535).

13022645 is an equidigital number, since it uses as much as digits as its factorization.

13022645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2604534.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 13022645 is about 3608.6902056009. The cubic root of 13022645 is about 235.2699177133.

Adding to 13022645 its reverse (54622031), we get a palindrome (67644676).

The spelling of 13022645 in words is "thirteen million, twenty-two thousand, six hundred forty-five".