13644745 has 8 divisors (see below), whose sum is σ = 16394184. Its totient is φ = 10902144.

The previous prime is 13644739. The next prime is 13644769. The reversal of 13644745 is 54744631.

It can be written as a sum of positive squares in 4 ways, for example, as 183184 + 13461561 = 428^2 + 3669^2 .

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 13644745 - 2⁹ = 13644233 is a prime.

It is a super-2 number, since 2×13644745² = 372358132230050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13644745.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5317 + ... + 7453.

It is an arithmetic number, because the mean of its divisors is an integer number (2049273).

Almost surely, 2^13644745 is an apocalyptic number.

It is an amenable number.

13644745 is a deficient number, since it is larger than the sum of its proper divisors (2749439).

13644745 is a wasteful number, since it uses less digits than its factorization.

13644745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3419.

The product of its digits is 40320, while the sum is 34.

The square root of 13644745 is about 3693.8793970567. The cubic root of 13644745 is about 238.9581283183.

The spelling of 13644745 in words is "thirteen million, six hundred forty-four thousand, seven hundred forty-five".