111436405 has 4 divisors (see below), whose sum is σ = 133723692. Its totient is φ = 89149120.

The previous prime is 111436363. The next prime is 111436433. The reversal of 111436405 is 504634111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65318724 + 46117681 = 8082^2 + 6791^2 .

It is not a de Polignac number, because 111436405 - 2¹⁵ = 111403637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111436405.

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, 11143636 + ... + 11143645.

It is an arithmetic number, because the mean of its divisors is an integer number (33430923).

Almost surely, 2^111436405 is an apocalyptic number.

It is an amenable number.

111436405 is a deficient number, since it is larger than the sum of its proper divisors (22287287).

111436405 is an equidigital number, since it uses as much as digits as its factorization.

111436405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22287286.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 111436405 is about 10556.3443009405. The cubic root of 111436405 is about 481.2185546441.

The spelling of 111436405 in words is "one hundred eleven million, four hundred thirty-six thousand, four hundred five".