111601 has 8 divisors (see below), whose sum is σ = 129600.
Its totient is φ = 94128.
The previous prime is 111599. The next prime is 111611. The reversal of 111601 is 106111.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 111601 - 21 = 111599 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (111611) 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 7 ways as a sum of consecutive naturals, for example, 675 + ... + 823.
It is an arithmetic number, because the mean of its divisors is an integer number (16200).
2111601 is an apocalyptic number.
It is an amenable number.
111601 is a deficient number, since it is larger than the sum of its proper divisors (17999).
111601 is a wasteful number, since it uses less digits than its factorization.
111601 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 263.
The product of its (nonzero) digits is 6, while the sum is 10.
The square root of 111601 is about 334.0673584773.
The cubic root of 111601 is about 48.1455362963.
Adding to 111601 its reverse (106111), we get a palindrome (217712).
The spelling of 111601 in words is "one hundred eleven thousand, six hundred one".