111644 has 24 divisors (see below), whose sum is σ = 223440. Its totient is φ = 48384.

The previous prime is 111641. The next prime is 111653. The reversal of 111644 is 446111.

111644 is an admirable number.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 932 + ... + 1044.

It is an arithmetic number, because the mean of its divisors is an integer number (9310).

2¹¹¹⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

111644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111644 is a wasteful number, since it uses less digits than its factorization.

111644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 147 counting only the distinct ones).

The product of its digits is 96, while the sum is 17.

The square root of 111644 is about 334.1317105574. The cubic root of 111644 is about 48.1517190134.

Adding to 111644 its reverse (446111), we get a palindrome (557755).

The spelling of 111644 in words is "one hundred eleven thousand, six hundred forty-four".