111572 has 6 divisors (see below), whose sum is σ = 195258. Its totient is φ = 55784.

The previous prime is 111539. The next prime is 111577. The reversal of 111572 is 275111.

It can be written as a sum of positive squares in only one way, i.e., 111556 + 16 = 334^2 + 4^2 .

It is a super-2 number, since 2×111572² = 24896622368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111572.

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 111572.

It is not an unprimeable number, because it can be changed into a prime (111577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13943 + ... + 13950.

It is an arithmetic number, because the mean of its divisors is an integer number (32543).

2¹¹¹⁵⁷² is an apocalyptic number.

It is an amenable number.

111572 is a deficient number, since it is larger than the sum of its proper divisors (83686).

111572 is a wasteful number, since it uses less digits than its factorization.

111572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27897 (or 27895 counting only the distinct ones).

The product of its digits is 70, while the sum is 17.

The square root of 111572 is about 334.0239512370. The cubic root of 111572 is about 48.1413656601.

Adding to 111572 its reverse (275111), we get a palindrome (386683).

The spelling of 111572 in words is "one hundred eleven thousand, five hundred seventy-two".