1111542149 has 2 divisors, whose sum is σ = 1111542150. Its totient is φ = 1111542148.

The previous prime is 1111542121. The next prime is 1111542167. The reversal of 1111542149 is 9412451111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1103236225 + 8305924 = 33215^2 + 2882^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111542149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111542119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555771074 + 555771075.

It is an arithmetic number, because the mean of its divisors is an integer number (555771075).

Almost surely, 2^1111542149 is an apocalyptic number.

It is an amenable number.

1111542149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111542149 is an equidigital number, since it uses as much as digits as its factorization.

1111542149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 29.

The square root of 1111542149 is about 33339.7982747347. The cubic root of 1111542149 is about 1035.8780848299.

The spelling of 1111542149 in words is "one billion, one hundred eleven million, five hundred forty-two thousand, one hundred forty-nine".