13289565 has 8 divisors (see below), whose sum is σ = 21263328. Its totient is φ = 7087760.

The previous prime is 13289543. The next prime is 13289581. The reversal of 13289565 is 56598231.

13289565 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13289565 - 2⁶ = 13289501 is a prime.

It is a super-2 number, since 2×13289565² = 353225075778450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 442971 + ... + 443000.

It is an arithmetic number, because the mean of its divisors is an integer number (2657916).

Almost surely, 2^13289565 is an apocalyptic number.

13289565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13289565 is a deficient number, since it is larger than the sum of its proper divisors (7973763).

13289565 is an equidigital number, since it uses as much as digits as its factorization.

13289565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885979.

The product of its digits is 64800, while the sum is 39.

The square root of 13289565 is about 3645.4855643659. The cubic root of 13289565 is about 236.8664703848.

The spelling of 13289565 in words is "thirteen million, two hundred eighty-nine thousand, five hundred sixty-five".