111898 has 4 divisors (see below), whose sum is σ = 167850. Its totient is φ = 55948.

The previous prime is 111893. The next prime is 111913. The reversal of 111898 is 898111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 898111 = 19 ⋅47269.

It can be written as a sum of positive squares in only one way, i.e., 104329 + 7569 = 323^2 + 87^2 .

It is not an unprimeable number, because it can be changed into a prime (111893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27973 + ... + 27976.

2¹¹¹⁸⁹⁸ is an apocalyptic number.

111898 is a deficient number, since it is larger than the sum of its proper divisors (55952).

111898 is an equidigital number, since it uses as much as digits as its factorization.

111898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55951.

The product of its digits is 576, while the sum is 28.

The square root of 111898 is about 334.5115842538. The cubic root of 111898 is about 48.1882078325.

The spelling of 111898 in words is "one hundred eleven thousand, eight hundred ninety-eight".