113861 has 6 divisors (see below), whose sum is σ = 125286. Its totient is φ = 103400.

The previous prime is 113843. The next prime is 113891. The reversal of 113861 is 168311.

It can be written as a sum of positive squares in only one way, i.e., 101761 + 12100 = 319^2 + 110^2 .

It is not a de Polignac number, because 113861 - 2⁶ = 113797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113891) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 350 + ... + 591.

It is an arithmetic number, because the mean of its divisors is an integer number (20881).

2¹¹³⁸⁶¹ is an apocalyptic number.

113861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

113861 is a deficient number, since it is larger than the sum of its proper divisors (11425).

113861 is an equidigital number, since it uses as much as digits as its factorization.

113861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963 (or 952 counting only the distinct ones).

The product of its digits is 144, while the sum is 20.

The square root of 113861 is about 337.4329563039. The cubic root of 113861 is about 48.4683607014.

The spelling of 113861 in words is "one hundred thirteen thousand, eight hundred sixty-one".