155424 has 24 divisors (see below), whose sum is σ = 408240. Its totient is φ = 51776.

The previous prime is 155423. The next prime is 155443. The reversal of 155424 is 424551.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 155424.

It is not an unprimeable number, because it can be changed into a prime (155423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 714 + ... + 905.

It is an arithmetic number, because the mean of its divisors is an integer number (17010).

2¹⁵⁵⁴²⁴ is an apocalyptic number.

It is an amenable number.

155424 is an abundant number, since it is smaller than the sum of its proper divisors (252816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155424 is a wasteful number, since it uses less digits than its factorization.

155424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632 (or 1624 counting only the distinct ones).

The product of its digits is 800, while the sum is 21.

The square root of 155424 is about 394.2385064907. The cubic root of 155424 is about 53.7657894842.

Subtracting from 155424 its sum of digits (21), we obtain a triangular number (155403 = T₅₅₇).

Adding to 155424 its reverse (424551), we get a palindrome (579975).

The spelling of 155424 in words is "one hundred fifty-five thousand, four hundred twenty-four".