13086505 has 4 divisors (see below), whose sum is σ = 15703812. Its totient is φ = 10469200.

The previous prime is 13086499. The next prime is 13086509. The reversal of 13086505 is 50568031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3283344 + 9803161 = 1812^2 + 3131^2 .

It is not a de Polignac number, because 13086505 - 2⁵ = 13086473 is a prime.

It is a super-2 number, since 2×13086505² = 342513226230050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13086509) 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, 1308646 + ... + 1308655.

It is an arithmetic number, because the mean of its divisors is an integer number (3925953).

Almost surely, 2^13086505 is an apocalyptic number.

It is an amenable number.

13086505 is a deficient number, since it is larger than the sum of its proper divisors (2617307).

13086505 is an equidigital number, since it uses as much as digits as its factorization.

13086505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617306.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 13086505 is about 3617.5274705246. The cubic root of 13086505 is about 235.6538603257.

It can be divided in two parts, 13086 and 505, that multiplied together give a triangular number (6608430 = T₃₆₃₅).

The spelling of 13086505 in words is "thirteen million, eighty-six thousand, five hundred five".