155112 has 32 divisors (see below), whose sum is σ = 406080. Its totient is φ = 49280.

The previous prime is 155087. The next prime is 155119. The reversal of 155112 is 211551.

It is a junction number, because it is equal to n+sod(n) for n = 155091 and 155100.

It is not an unprimeable number, because it can be changed into a prime (155119) by changing a digit.

155112 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 7 ways as a sum of consecutive naturals, for example, 412 + ... + 692.

It is an arithmetic number, because the mean of its divisors is an integer number (12690).

2¹⁵⁵¹¹² is an apocalyptic number.

155112 is a gapful number since it is divisible by the number (12) 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 155112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203040).

155112 is an abundant number, since it is smaller than the sum of its proper divisors (250968).

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

155112 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (155111) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (309).

155112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 309 counting only the distinct ones).

The product of its digits is 50, while the sum is 15.

The square root of 155112 is about 393.8426081571. The cubic root of 155112 is about 53.7297886873.

Adding to 155112 its reverse (211551), we get a palindrome (366663).

The spelling of 155112 in words is "one hundred fifty-five thousand, one hundred twelve".