155804 has 12 divisors (see below), whose sum is σ = 297528. Its totient is φ = 70800.

The previous prime is 155801. The next prime is 155809. The reversal of 155804 is 408551.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 155804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1727 + ... + 1814.

It is an arithmetic number, because the mean of its divisors is an integer number (24794).

2¹⁵⁵⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

155804 is a deficient number, since it is larger than the sum of its proper divisors (141724).

155804 is a wasteful number, since it uses less digits than its factorization.

155804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3556 (or 3554 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 155804 is about 394.7201540332. The cubic root of 155804 is about 53.8095715939.

It can be divided in two parts, 155 and 804, that added together give a palindrome (959).

The spelling of 155804 in words is "one hundred fifty-five thousand, eight hundred four".