13261903 has 4 divisors (see below), whose sum is σ = 13719240. Its totient is φ = 12804568.

The previous prime is 13261891. The next prime is 13261907. The reversal of 13261903 is 30916231.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13261903 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 (13261907) 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, 228625 + ... + 228682.

It is an arithmetic number, because the mean of its divisors is an integer number (3429810).

Almost surely, 2^13261903 is an apocalyptic number.

13261903 is a deficient number, since it is larger than the sum of its proper divisors (457337).

13261903 is an equidigital number, since it uses as much as digits as its factorization.

13261903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457336.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 13261903 is about 3641.6895804008. The cubic root of 13261903 is about 236.7020117371.

The spelling of 13261903 in words is "thirteen million, two hundred sixty-one thousand, nine hundred three".