112381 has 4 divisors (see below), whose sum is σ = 115164. Its totient is φ = 109600.

The previous prime is 112363. The next prime is 112397. The reversal of 112381 is 183211.

112381 = 31² + 32² + ... + 71².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16900 + 95481 = 130^2 + 309^2 .

It is a cyclic number.

It is not a de Polignac number, because 112381 - 2⁵ = 112349 is a prime.

It is a super-2 number, since 2×112381² = 25258978322, which contains 22 as substring.

It is a Duffinian number.

112381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1330 + ... + 1411.

It is an arithmetic number, because the mean of its divisors is an integer number (28791).

2¹¹²³⁸¹ is an apocalyptic number.

It is an amenable number.

112381 is a deficient number, since it is larger than the sum of its proper divisors (2783).

112381 is an equidigital number, since it uses as much as digits as its factorization.

112381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2782.

The product of its digits is 48, while the sum is 16.

The square root of 112381 is about 335.2327549629. The cubic root of 112381 is about 48.2574420049.

Adding to 112381 its reverse (183211), we get a palindrome (295592).

The spelling of 112381 in words is "one hundred twelve thousand, three hundred eighty-one".