155404 has 6 divisors (see below), whose sum is σ = 271964. Its totient is φ = 77700.

The previous prime is 155399. The next prime is 155413. The reversal of 155404 is 404551.

155404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a pancake number, because a pancake can be divided into 155404 parts by 557 straight cuts.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19422 + ... + 19429.

2¹⁵⁵⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

155404 is a deficient number, since it is larger than the sum of its proper divisors (116560).

155404 is a wasteful number, since it uses less digits than its factorization.

155404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38855 (or 38853 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 155404 is about 394.2131403188. The cubic root of 155404 is about 53.7634831868.

Adding to 155404 its reverse (404551), we get a palindrome (559955).

The spelling of 155404 in words is "one hundred fifty-five thousand, four hundred four".