13402287 has 8 divisors (see below), whose sum is σ = 19855280. Its totient is φ = 8934840.

The previous prime is 13402253. The next prime is 13402297. The reversal of 13402287 is 78220431.

13402287 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13402287 - 2⁶ = 13402223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 496381 = 13402287 / (1 + 3 + 4 + 0 + 2 + 2 + 8 + 7).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13402287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13402237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248164 + ... + 248217.

It is an arithmetic number, because the mean of its divisors is an integer number (2481910).

Almost surely, 2^13402287 is an apocalyptic number.

13402287 is a deficient number, since it is larger than the sum of its proper divisors (6452993).

13402287 is an equidigital number, since it uses as much as digits as its factorization.

13402287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496390 (or 496384 counting only the distinct ones).

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

The square root of 13402287 is about 3660.9134106122. The cubic root of 13402287 is about 237.5342857243.

It can be divided in two parts, 13402 and 287, that added together give a square (13689 = 117²).

The spelling of 13402287 in words is "thirteen million, four hundred two thousand, two hundred eighty-seven".