155799 has 12 divisors (see below), whose sum is σ = 257296. Its totient is φ = 88992.

The previous prime is 155797. The next prime is 155801. The reversal of 155799 is 997551.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (155797) and next prime (155801).

It is not a de Polignac number, because 155799 - 2¹ = 155797 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155797) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1174 + ... + 1299.

2¹⁵⁵⁷⁹⁹ is an apocalyptic number.

155799 is a deficient number, since it is larger than the sum of its proper divisors (101497).

155799 is a wasteful number, since it uses less digits than its factorization.

155799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2486 (or 2483 counting only the distinct ones).

The product of its digits is 14175, while the sum is 36.

The square root of 155799 is about 394.7138203813. The cubic root of 155799 is about 53.8089959759.

The spelling of 155799 in words is "one hundred fifty-five thousand, seven hundred ninety-nine".