111243617 has 4 divisors (see below), whose sum is σ = 116080320. Its totient is φ = 106406916.

The previous prime is 111243611. The next prime is 111243637. The reversal of 111243617 is 716342111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 716342111 = 15767 ⋅45433.

It is a cyclic number.

It is not a de Polignac number, because 111243617 - 2⁶ = 111243553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111243611) 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, 2418317 + ... + 2418362.

It is an arithmetic number, because the mean of its divisors is an integer number (29020080).

Almost surely, 2^111243617 is an apocalyptic number.

It is an amenable number.

111243617 is a deficient number, since it is larger than the sum of its proper divisors (4836703).

111243617 is an equidigital number, since it uses as much as digits as its factorization.

111243617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4836702.

The product of its digits is 1008, while the sum is 26.

The square root of 111243617 is about 10547.2089673050. The cubic root of 111243617 is about 480.9408874125.

Adding to 111243617 its reverse (716342111), we get a palindrome (827585728).

It can be divided in two parts, 11124 and 3617, that added together give a palindrome (14741).

The spelling of 111243617 in words is "one hundred eleven million, two hundred forty-three thousand, six hundred seventeen".