111279 has 12 divisors (see below), whose sum is σ = 172824. Its totient is φ = 63504.

The previous prime is 111271. The next prime is 111301. The reversal of 111279 is 972111.

It is not a de Polignac number, because 111279 - 2³ = 111271 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 232 + ... + 525.

It is an arithmetic number, because the mean of its divisors is an integer number (14402).

2¹¹¹²⁷⁹ is an apocalyptic number.

111279 is a deficient number, since it is larger than the sum of its proper divisors (61545).

111279 is an equidigital number, since it uses as much as digits as its factorization.

111279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774 (or 767 counting only the distinct ones).

The product of its digits is 126, while the sum is 21.

The square root of 111279 is about 333.5850716084. The cubic root of 111279 is about 48.0991872593.

The spelling of 111279 in words is "one hundred eleven thousand, two hundred seventy-nine".