13605705 has 32 divisors (see below), whose sum is σ = 24460800. Its totient is φ = 7174656.

The previous prime is 13605689. The next prime is 13605733. The reversal of 13605705 is 50750631.

13605705 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 13605705 - 2⁴ = 13605689 is a prime.

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

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, 12576 + ... + 13614.

It is an arithmetic number, because the mean of its divisors is an integer number (764400).

Almost surely, 2^13605705 is an apocalyptic number.

13605705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13605705 is a deficient number, since it is larger than the sum of its proper divisors (10855095).

13605705 is a wasteful number, since it uses less digits than its factorization.

13605705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150 (or 1144 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 27.

The square root of 13605705 is about 3688.5911944806. The cubic root of 13605705 is about 238.7300102961.

The spelling of 13605705 in words is "thirteen million, six hundred five thousand, seven hundred five".