1111431 has 4 divisors (see below), whose sum is σ = 1481912. Its totient is φ = 740952.

The previous prime is 1111427. The next prime is 1111433. The reversal of 1111431 is 1341111.

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

It is not a de Polignac number, because 1111431 - 2² = 1111427 is a prime.

It is a super-2 number, since 2×1111431² = 2470557735522, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

1111431 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185236 + ... + 185241.

It is an arithmetic number, because the mean of its divisors is an integer number (370478).

2^1111431 is an apocalyptic number.

1111431 is a deficient number, since it is larger than the sum of its proper divisors (370481).

1111431 is an equidigital number, since it uses as much as digits as its factorization.

1111431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370480.

The product of its digits is 12, while the sum is 12.

The square root of 1111431 is about 1054.2442790928. The cubic root of 1111431 is about 103.5843556029.

Adding to 1111431 its reverse (1341111), we get a palindrome (2452542).

The spelling of 1111431 in words is "one million, one hundred eleven thousand, four hundred thirty-one".