1111431247 has 2 divisors, whose sum is σ = 1111431248. Its totient is φ = 1111431246.

The previous prime is 1111431161. The next prime is 1111431281. The reversal of 1111431247 is 7421341111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111431247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111431547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555715623 + 555715624.

It is an arithmetic number, because the mean of its divisors is an integer number (555715624).

Almost surely, 2^1111431247 is an apocalyptic number.

1111431247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111431247 is an equidigital number, since it uses as much as digits as its factorization.

1111431247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 25.

The square root of 1111431247 is about 33338.1350258229. The cubic root of 1111431247 is about 1035.8436327633.

Adding to 1111431247 its reverse (7421341111), we get a palindrome (8532772358).

The spelling of 1111431247 in words is "one billion, one hundred eleven million, four hundred thirty-one thousand, two hundred forty-seven".