111424405 has 4 divisors (see below), whose sum is σ = 133709292. Its totient is φ = 89139520.

The previous prime is 111424393. The next prime is 111424433. The reversal of 111424405 is 504424111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504424111 = 449 ⋅1123439.

It can be written as a sum of positive squares in 2 ways, for example, as 58629649 + 52794756 = 7657^2 + 7266^2 .

It is not a de Polignac number, because 111424405 - 2¹¹ = 111422357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11142436 + ... + 11142445.

It is an arithmetic number, because the mean of its divisors is an integer number (33427323).

Almost surely, 2^111424405 is an apocalyptic number.

It is an amenable number.

111424405 is a deficient number, since it is larger than the sum of its proper divisors (22284887).

111424405 is an equidigital number, since it uses as much as digits as its factorization.

111424405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22284886.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 111424405 is about 10555.7759070568. The cubic root of 111424405 is about 481.2012807261.

Adding to 111424405 its reverse (504424111), we get a palindrome (615848516).

The spelling of 111424405 in words is "one hundred eleven million, four hundred twenty-four thousand, four hundred five".