111724417 has 4 divisors (see below), whose sum is σ = 127685056. Its totient is φ = 95763780.

The previous prime is 111724399. The next prime is 111724421. The reversal of 111724417 is 714427111.

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: 714427111 = 1423 ⋅502057.

It is a de Polignac number, because none of the positive numbers 2^k-111724417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111724517) 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, 7980309 + ... + 7980322.

It is an arithmetic number, because the mean of its divisors is an integer number (31921264).

Almost surely, 2^111724417 is an apocalyptic number.

It is an amenable number.

111724417 is a deficient number, since it is larger than the sum of its proper divisors (15960639).

111724417 is an equidigital number, since it uses as much as digits as its factorization.

111724417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15960638.

The product of its digits is 1568, while the sum is 28.

The square root of 111724417 is about 10569.9771522932. The cubic root of 111724417 is about 481.6327744152.

The spelling of 111724417 in words is "one hundred eleven million, seven hundred twenty-four thousand, four hundred seventeen".