13622645 has 4 divisors (see below), whose sum is σ = 16347180. Its totient is φ = 10898112.

The previous prime is 13622633. The next prime is 13622669. The reversal of 13622645 is 54622631.

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 4490161 + 9132484 = 2119^2 + 3022^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13622645 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1362260 + ... + 1362269.

It is an arithmetic number, because the mean of its divisors is an integer number (4086795).

Almost surely, 2^13622645 is an apocalyptic number.

It is an amenable number.

13622645 is a deficient number, since it is larger than the sum of its proper divisors (2724535).

13622645 is an equidigital number, since it uses as much as digits as its factorization.

13622645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2724534.

The product of its digits is 8640, while the sum is 29.

The square root of 13622645 is about 3690.8867498204. The cubic root of 13622645 is about 238.8290474071.

The spelling of 13622645 in words is "thirteen million, six hundred twenty-two thousand, six hundred forty-five".