15659 has 4 divisors (see below), whose sum is σ = 17904. Its totient is φ = 13416.

The previous prime is 15649. The next prime is 15661. The reversal of 15659 is 95651.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15659 - 2⁴ = 15643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1112 + ... + 1125.

It is an arithmetic number, because the mean of its divisors is an integer number (4476).

2¹⁵⁶⁵⁹ is an apocalyptic number.

15659 is a deficient number, since it is larger than the sum of its proper divisors (2245).

15659 is an equidigital number, since it uses as much as digits as its factorization.

15659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244.

The product of its digits is 1350, while the sum is 26.

The square root of 15659 is about 125.1359260964. The cubic root of 15659 is about 25.0181201965.

The spelling of 15659 in words is "fifteen thousand, six hundred fifty-nine".