13305861 has 6 divisors (see below), whose sum is σ = 19219590. Its totient is φ = 8870568.

The previous prime is 13305839. The next prime is 13305881. The reversal of 13305861 is 16850331.

It can be written as a sum of positive squares in only one way, i.e., 9180900 + 4124961 = 3030^2 + 2031^2 .

It is not a de Polignac number, because 13305861 - 2⁶ = 13305797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13305821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 739206 + ... + 739223.

It is an arithmetic number, because the mean of its divisors is an integer number (3203265).

Almost surely, 2^13305861 is an apocalyptic number.

It is an amenable number.

13305861 is a deficient number, since it is larger than the sum of its proper divisors (5913729).

13305861 is a wasteful number, since it uses less digits than its factorization.

13305861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478435 (or 1478432 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 13305861 is about 3647.7199728049. The cubic root of 13305861 is about 236.9632480532.

The spelling of 13305861 in words is "thirteen million, three hundred five thousand, eight hundred sixty-one".