111620 has 12 divisors (see below), whose sum is σ = 234444. Its totient is φ = 44640.

The previous prime is 111611. The next prime is 111623. The reversal of 111620 is 26111.

It can be written as a sum of positive squares in 2 ways, for example, as 37636 + 73984 = 194^2 + 272^2 .

It is not an unprimeable number, because it can be changed into a prime (111623) by changing a digit.

111620 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 3 ways as a sum of consecutive naturals, for example, 2771 + ... + 2810.

It is an arithmetic number, because the mean of its divisors is an integer number (19537).

2¹¹¹⁶²⁰ is an apocalyptic number.

111620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111620 is an abundant number, since it is smaller than the sum of its proper divisors (122824).

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

111620 is a wasteful number, since it uses less digits than its factorization.

111620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5590 (or 5588 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 111620 is about 334.0957946458. The cubic root of 111620 is about 48.1482683904.

Adding to 111620 its reverse (26111), we get a palindrome (137731).

The spelling of 111620 in words is "one hundred eleven thousand, six hundred twenty".