1111143457 has 2 divisors, whose sum is σ = 1111143458. Its totient is φ = 1111143456.

The previous prime is 1111143431. The next prime is 1111143461. The reversal of 1111143457 is 7543411111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1110488976 + 654481 = 33324^2 + 809^2 .

It is an emirp because it is prime and its reverse (7543411111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111143457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1111143557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555571728 + 555571729.

It is an arithmetic number, because the mean of its divisors is an integer number (555571729).

Almost surely, 2^1111143457 is an apocalyptic number.

It is an amenable number.

1111143457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111143457 is an equidigital number, since it uses as much as digits as its factorization.

1111143457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 28.

The square root of 1111143457 is about 33333.8185181356. The cubic root of 1111143457 is about 1035.7542191735.

Adding to 1111143457 its reverse (7543411111), we get a palindrome (8654554568).

The spelling of 1111143457 in words is "one billion, one hundred eleven million, one hundred forty-three thousand, four hundred fifty-seven".