155504 has 10 divisors (see below), whose sum is σ = 301320. Its totient is φ = 77744.

The previous prime is 155501. The next prime is 155509. The reversal of 155504 is 405551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4844 + ... + 4875.

It is an arithmetic number, because the mean of its divisors is an integer number (30132).

2¹⁵⁵⁵⁰⁴ is an apocalyptic number.

It is an amenable number.

155504 is a deficient number, since it is larger than the sum of its proper divisors (145816).

155504 is an equidigital number, since it uses as much as digits as its factorization.

155504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9727 (or 9721 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 155504 is about 394.3399548613. The cubic root of 155504 is about 53.7750126960.

Subtracting 155504 from its reverse (405551), we obtain a cube (250047 = 63³).

The spelling of 155504 in words is "one hundred fifty-five thousand, five hundred four".