112661 has 4 divisors (see below), whose sum is σ = 113772. Its totient is φ = 111552.

The previous prime is 112657. The next prime is 112663. The reversal of 112661 is 166211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 166211 = 71 ⋅2341.

It can be written as a sum of positive squares in 2 ways, for example, as 42436 + 70225 = 206^2 + 265^2 .

It is a cyclic number.

It is not a de Polignac number, because 112661 - 2² = 112657 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386 + ... + 611.

It is an arithmetic number, because the mean of its divisors is an integer number (28443).

2¹¹²⁶⁶¹ is an apocalyptic number.

It is an amenable number.

112661 is a deficient number, since it is larger than the sum of its proper divisors (1111).

112661 is an equidigital number, since it uses as much as digits as its factorization.

112661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110.

The product of its digits is 72, while the sum is 17.

The square root of 112661 is about 335.6501154476. The cubic root of 112661 is about 48.2974869632.

Adding to 112661 its reverse (166211), we get a palindrome (278872).

It can be divided in two parts, 1126 and 61, that multiplied together give a palindrome (68686).

The spelling of 112661 in words is "one hundred twelve thousand, six hundred sixty-one".