13624645 has 4 divisors (see below), whose sum is σ = 16349580. Its totient is φ = 10899712.

The previous prime is 13624627. The next prime is 13624649. The reversal of 13624645 is 54642631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54642631 = 5113 ⋅10687.

It can be written as a sum of positive squares in 2 ways, for example, as 10246401 + 3378244 = 3201^2 + 1838^2 .

It is a cyclic number.

It is not a de Polignac number, because 13624645 - 2⁵ = 13624613 is a prime.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13624649) 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, 1362460 + ... + 1362469.

It is an arithmetic number, because the mean of its divisors is an integer number (4087395).

Almost surely, 2^13624645 is an apocalyptic number.

It is an amenable number.

13624645 is a deficient number, since it is larger than the sum of its proper divisors (2724935).

13624645 is an equidigital number, since it uses as much as digits as its factorization.

13624645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2724934.

The product of its digits is 17280, while the sum is 31.

The square root of 13624645 is about 3691.1576774774. The cubic root of 13624645 is about 238.8407346803.

The spelling of 13624645 in words is "thirteen million, six hundred twenty-four thousand, six hundred forty-five".