13240287 has 16 divisors (see below), whose sum is σ = 19802880. Its totient is φ = 8742456.

The previous prime is 13240231. The next prime is 13240291. The reversal of 13240287 is 78204231.

It is not a de Polignac number, because 13240287 - 2⁶ = 13240223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 13240287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13240217) 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, 598 + ... + 5180.

It is an arithmetic number, because the mean of its divisors is an integer number (1237680).

Almost surely, 2^13240287 is an apocalyptic number.

13240287 is a deficient number, since it is larger than the sum of its proper divisors (6562593).

13240287 is a wasteful number, since it uses less digits than its factorization.

13240287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4699 (or 4693 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 13240287 is about 3638.7205168850. The cubic root of 13240287 is about 236.5733390752.

The spelling of 13240287 in words is "thirteen million, two hundred forty thousand, two hundred eighty-seven".