155142 has 48 divisors (see below), whose sum is σ = 395280. Its totient is φ = 44928.

The previous prime is 155137. The next prime is 155153. The reversal of 155142 is 241551.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 155142.

It is an unprimeable number.

155142 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 23 ways as a sum of consecutive naturals, for example, 9118 + ... + 9134.

It is an arithmetic number, because the mean of its divisors is an integer number (8235).

2¹⁵⁵¹⁴² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197640).

155142 is an abundant number, since it is smaller than the sum of its proper divisors (240138).

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

155142 is a wasteful number, since it uses less digits than its factorization.

155142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54 (or 35 counting only the distinct ones).

The product of its digits is 200, while the sum is 18.

The square root of 155142 is about 393.8806925961. The cubic root of 155142 is about 53.7332523990.

Adding to 155142 its reverse (241551), we get a palindrome (396693).

The spelling of 155142 in words is "one hundred fifty-five thousand, one hundred forty-two".