13563745 has 8 divisors (see below), whose sum is σ = 17528616. Its totient is φ = 10016256.

The previous prime is 13563733. The next prime is 13563749. The reversal of 13563745 is 54736531.

It can be written as a sum of positive squares in 4 ways, for example, as 190096 + 13373649 = 436^2 + 3657^2 .

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 13563745 - 2⁷ = 13563617 is a prime.

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 13563745.

It is not an unprimeable number, because it can be changed into a prime (13563749) 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, 104272 + ... + 104401.

It is an arithmetic number, because the mean of its divisors is an integer number (2191077).

Almost surely, 2^13563745 is an apocalyptic number.

It is an amenable number.

13563745 is a deficient number, since it is larger than the sum of its proper divisors (3964871).

13563745 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 8 representation: 13563745 = (63573541)₈.

13563745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208691.

The product of its digits is 37800, while the sum is 34.

The square root of 13563745 is about 3682.8989939992. The cubic root of 13563745 is about 238.4843430924.

The spelling of 13563745 in words is "thirteen million, five hundred sixty-three thousand, seven hundred forty-five".