13564 has 6 divisors (see below), whose sum is σ = 23744. Its totient is φ = 6780.
The previous prime is 13553. The next prime is 13567. The reversal of 13564 is 46531.
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 (13567) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1692 + ... + 1699.
213564 is an apocalyptic number.
It is an amenable number.
13564 is a deficient number, since it is larger than the sum of its proper divisors (10180).
13564 is a wasteful number, since it uses less digits than its factorization.
13564 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3395 (or 3393 counting only the distinct ones).
The product of its digits is 360, while the sum is 19.
The square root of 13564 is about 116.4645868923. The cubic root of 13564 is about 23.8485837594.
Adding to 13564 its product of digits (360), we get a square (13924 = 1182).
The spelling of 13564 in words is "thirteen thousand, five hundred sixty-four".
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