13875705 has 20 divisors (see below), whose sum is σ = 24874212. Its totient is φ = 7400160.

The previous prime is 13875677. The next prime is 13875737. The reversal of 13875705 is 50757831.

13875705 is a `hidden beast` number, since 1 + 3 + 87 + 570 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10732176 + 3143529 = 3276^2 + 1773^2 .

It is not a de Polignac number, because 13875705 - 2²² = 9681401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13875705.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16726 + ... + 17535.

Almost surely, 2^13875705 is an apocalyptic number.

13875705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13875705 is a deficient number, since it is larger than the sum of its proper divisors (10998507).

13875705 is an equidigital number, since it uses as much as digits as its factorization.

13875705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34278 (or 34269 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The square root of 13875705 is about 3725.0107382396. The cubic root of 13875705 is about 240.2988464738.

The spelling of 13875705 in words is "thirteen million, eight hundred seventy-five thousand, seven hundred five".