111424409 has 8 divisors (see below), whose sum is σ = 122047560. Its totient is φ = 101253376.

The previous prime is 111424393. The next prime is 111424433. The reversal of 111424409 is 904424111.

It can be written as a sum of positive squares in 4 ways, for example, as 10220809 + 101203600 = 3197^2 + 10060^2 .

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 111424409 - 2⁴ = 111424393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111424459) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 112514 + ... + 113499.

It is an arithmetic number, because the mean of its divisors is an integer number (15255945).

Almost surely, 2^111424409 is an apocalyptic number.

It is an amenable number.

111424409 is a deficient number, since it is larger than the sum of its proper divisors (10623151).

111424409 is a wasteful number, since it uses less digits than its factorization.

111424409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226059.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 111424409 is about 10555.7760965265. The cubic root of 111424409 is about 481.2012864843.

It can be divided in two parts, 11142 and 4409, that added together give a palindrome (15551).

The spelling of 111424409 in words is "one hundred eleven million, four hundred twenty-four thousand, four hundred nine".