111242407 has 4 divisors (see below), whose sum is σ = 117786096. Its totient is φ = 104698720.

The previous prime is 111242399. The next prime is 111242429. The reversal of 111242407 is 704242111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 704242111 = 53 ⋅13287587.

It is a cyclic number.

It is not a de Polignac number, because 111242407 - 2³ = 111242399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111242497) 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, 3271819 + ... + 3271852.

It is an arithmetic number, because the mean of its divisors is an integer number (29446524).

Almost surely, 2^111242407 is an apocalyptic number.

111242407 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

111242407 is a deficient number, since it is larger than the sum of its proper divisors (6543689).

111242407 is an equidigital number, since it uses as much as digits as its factorization.

111242407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6543688.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 111242407 is about 10547.1516060024. The cubic root of 111242407 is about 480.9391436703.

Adding to 111242407 its reverse (704242111), we get a palindrome (815484518).

It can be divided in two parts, 11124 and 2407, that added together give a palindrome (13531).

The spelling of 111242407 in words is "one hundred eleven million, two hundred forty-two thousand, four hundred seven".