13087261 has 4 divisors (see below), whose sum is σ = 14277024. Its totient is φ = 11897500.

The previous prime is 13087259. The next prime is 13087279. The reversal of 13087261 is 16278031.

13087261 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13087261 - 2¹ = 13087259 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 (13087861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 594865 + ... + 594886.

It is an arithmetic number, because the mean of its divisors is an integer number (3569256).

Almost surely, 2^13087261 is an apocalyptic number.

13087261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13087261 is a deficient number, since it is larger than the sum of its proper divisors (1189763).

13087261 is a wasteful number, since it uses less digits than its factorization.

13087261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189762.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 13087261 is about 3617.6319602746. The cubic root of 13087261 is about 235.6583981018.

The spelling of 13087261 in words is "thirteen million, eighty-seven thousand, two hundred sixty-one".