13061865 has 32 divisors (see below), whose sum is σ = 22329216. Its totient is φ = 6497280.

The previous prime is 13061857. The next prime is 13061891. The reversal of 13061865 is 56816031.

It is not a de Polignac number, because 13061865 - 2³ = 13061857 is a prime.

It is a super-2 number, since 2×13061865² = 341224634556450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46014 + ... + 46296.

It is an arithmetic number, because the mean of its divisors is an integer number (697788).

Almost surely, 2^13061865 is an apocalyptic number.

13061865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13061865 is a deficient number, since it is larger than the sum of its proper divisors (9267351).

13061865 is a wasteful number, since it uses less digits than its factorization.

13061865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 13061865 is about 3614.1202248957. The cubic root of 13061865 is about 235.5058666684.

Adding to 13061865 its reverse (56816031), we get a palindrome (69877896).

The spelling of 13061865 in words is "thirteen million, sixty-one thousand, eight hundred sixty-five".