155659 has 8 divisors (see below), whose sum is σ = 183008. Its totient is φ = 129600.

The previous prime is 155657. The next prime is 155663. The reversal of 155659 is 956551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155659 - 2¹ = 155657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155659.

It is not an unprimeable number, because it can be changed into a prime (155653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42 + ... + 559.

It is an arithmetic number, because the mean of its divisors is an integer number (22876).

2¹⁵⁵⁶⁵⁹ is an apocalyptic number.

155659 is a deficient number, since it is larger than the sum of its proper divisors (27349).

155659 is an equidigital number, since it uses as much as digits as its factorization.

155659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645.

The product of its digits is 6750, while the sum is 31.

The square root of 155659 is about 394.5364368471. The cubic root of 155659 is about 53.7928736709.

Adding to 155659 its product of digits (6750), we get a square (162409 = 403²).

The spelling of 155659 in words is "one hundred fifty-five thousand, six hundred fifty-nine".