111111407 has 8 divisors (see below), whose sum is σ = 124488912. Its totient is φ = 98280000.

The previous prime is 111111397. The next prime is 111111421. The reversal of 111111407 is 704111111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111111407 - 2⁴ = 111111391 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 (111111467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136094 + ... + 136907.

It is an arithmetic number, because the mean of its divisors is an integer number (15561114).

Almost surely, 2^111111407 is an apocalyptic number.

111111407 is a deficient number, since it is larger than the sum of its proper divisors (13377505).

111111407 is a wasteful number, since it uses less digits than its factorization.

111111407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273049.

The product of its (nonzero) digits is 28, while the sum is 17.

The square root of 111111407 is about 10540.9395691276. The cubic root of 111111407 is about 480.7502835144.

Adding to 111111407 its reverse (704111111), we get a palindrome (815222518).

The spelling of 111111407 in words is "one hundred eleven million, one hundred eleven thousand, four hundred seven".