155040 has 96 divisors (see below), whose sum is σ = 544320. Its totient is φ = 36864.

The previous prime is 155027. The next prime is 155047. The reversal of 155040 is 40551.

155040 is nontrivially palindromic in base 14.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155047) by changing a digit.

155040 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8151 + ... + 8169.

It is an arithmetic number, because the mean of its divisors is an integer number (5670).

2¹⁵⁵⁰⁴⁰ is an apocalyptic number.

155040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272160).

155040 is an abundant number, since it is smaller than the sum of its proper divisors (389280).

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

155040 is a wasteful number, since it uses less digits than its factorization.

155040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 155040 is about 393.7511904744. The cubic root of 155040 is about 53.7214739566.

Adding to 155040 its reverse (40551), we get a palindrome (195591).

The spelling of 155040 in words is "one hundred fifty-five thousand, forty".