13120861 has 16 divisors (see below), whose sum is σ = 14676480. Its totient is φ = 11652480.

The previous prime is 13120853. The next prime is 13120867. The reversal of 13120861 is 16802131.

13120861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 13120861 - 2³ = 13120853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13120867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54780 + ... + 55018.

It is an arithmetic number, because the mean of its divisors is an integer number (917280).

Almost surely, 2^13120861 is an apocalyptic number.

It is an amenable number.

13120861 is a deficient number, since it is larger than the sum of its proper divisors (1555619).

13120861 is a wasteful number, since it uses less digits than its factorization.

13120861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 13120861 is about 3622.2729052351. The cubic root of 13120861 is about 235.8599008084.

Adding to 13120861 its reverse (16802131), we get a palindrome (29922992).

The spelling of 13120861 in words is "thirteen million, one hundred twenty thousand, eight hundred sixty-one".