111641 has 2 divisors, whose sum is σ = 111642. Its totient is φ = 111640.

The previous prime is 111637. The next prime is 111653. The reversal of 111641 is 146111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87616 + 24025 = 296^2 + 155^2 .

It is a cyclic number.

It is not a de Polignac number, because 111641 - 2² = 111637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 111641.

It is not a weakly prime, because it can be changed into another prime (111611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55820 + 55821.

It is an arithmetic number, because the mean of its divisors is an integer number (55821).

2¹¹¹⁶⁴¹ is an apocalyptic number.

It is an amenable number.

111641 is a deficient number, since it is larger than the sum of its proper divisors (1).

111641 is an equidigital number, since it uses as much as digits as its factorization.

111641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24, while the sum is 14.

The square root of 111641 is about 334.1272212796. The cubic root of 111641 is about 48.1512877126.

Adding to 111641 its reverse (146111), we get a palindrome (257752).

The spelling of 111641 in words is "one hundred eleven thousand, six hundred forty-one".