13287005 has 4 divisors (see below), whose sum is σ = 15944412. Its totient is φ = 10629600.

The previous prime is 13286989. The next prime is 13287007. The reversal of 13287005 is 50078231.

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 6120676 + 7166329 = 2474^2 + 2677^2 .

It is not a de Polignac number, because 13287005 - 2⁴ = 13286989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13287007) 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, 1328696 + ... + 1328705.

It is an arithmetic number, because the mean of its divisors is an integer number (3986103).

Almost surely, 2^13287005 is an apocalyptic number.

It is an amenable number.

13287005 is a deficient number, since it is larger than the sum of its proper divisors (2657407).

13287005 is an equidigital number, since it uses as much as digits as its factorization.

13287005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2657406.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 13287005 is about 3645.1344282482. The cubic root of 13287005 is about 236.8512600273.

The spelling of 13287005 in words is "thirteen million, two hundred eighty-seven thousand, five".