111745 has 4 divisors (see below), whose sum is σ = 134100. Its totient is φ = 89392.

The previous prime is 111733. The next prime is 111751. The reversal of 111745 is 547111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 547111 = 17 ⋅32183.

It can be written as a sum of positive squares in 2 ways, for example, as 28224 + 83521 = 168^2 + 289^2 .

It is a cyclic number.

It is not a de Polignac number, because 111745 - 2¹³ = 103553 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11170 + ... + 11179.

It is an arithmetic number, because the mean of its divisors is an integer number (33525).

2¹¹¹⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

111745 is a deficient number, since it is larger than the sum of its proper divisors (22355).

111745 is an equidigital number, since it uses as much as digits as its factorization.

111745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22354.

The product of its digits is 140, while the sum is 19.

The square root of 111745 is about 334.2828143952. The cubic root of 111745 is about 48.1662349683.

Adding to 111745 its reverse (547111), we get a palindrome (658856).

The spelling of 111745 in words is "one hundred eleven thousand, seven hundred forty-five".