13240865 has 8 divisors (see below), whose sum is σ = 17333568. Its totient is φ = 9629680.

The previous prime is 13240859. The next prime is 13240873. The reversal of 13240865 is 56804231.

13240865 = 415² + 416² + ... + 480².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13240865 - 2⁸ = 13240609 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120317 + ... + 120426.

It is an arithmetic number, because the mean of its divisors is an integer number (2166696).

Almost surely, 2^13240865 is an apocalyptic number.

It is an amenable number.

13240865 is a deficient number, since it is larger than the sum of its proper divisors (4092703).

13240865 is a wasteful number, since it uses less digits than its factorization.

13240865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240759.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 13240865 is about 3638.7999395405. The cubic root of 13240865 is about 236.5767815334.

The spelling of 13240865 in words is "thirteen million, two hundred forty thousand, eight hundred sixty-five".