13261859 has 4 divisors (see below), whose sum is σ = 14282016. Its totient is φ = 12241704.

The previous prime is 13261847. The next prime is 13261861. The reversal of 13261859 is 95816231.

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

It is a cyclic number.

It is not a de Polignac number, because 13261859 - 2²⁰ = 12213283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13261879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510059 + ... + 510084.

It is an arithmetic number, because the mean of its divisors is an integer number (3570504).

Almost surely, 2^13261859 is an apocalyptic number.

13261859 is a deficient number, since it is larger than the sum of its proper divisors (1020157).

13261859 is a wasteful number, since it uses less digits than its factorization.

13261859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020156.

The product of its digits is 12960, while the sum is 35.

The square root of 13261859 is about 3641.6835392439. The cubic root of 13261859 is about 236.7017499622.

The spelling of 13261859 in words is "thirteen million, two hundred sixty-one thousand, eight hundred fifty-nine".