1121576849 has 2 divisors, whose sum is σ = 1121576850. Its totient is φ = 1121576848.

The previous prime is 1121576837. The next prime is 1121576857. The reversal of 1121576849 is 9486751211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1082739025 + 38837824 = 32905^2 + 6232^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121576849 - 2²⁰ = 1120528273 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121506849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560788424 + 560788425.

It is an arithmetic number, because the mean of its divisors is an integer number (560788425).

Almost surely, 2^1121576849 is an apocalyptic number.

It is an amenable number.

1121576849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121576849 is an equidigital number, since it uses as much as digits as its factorization.

1121576849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 44.

The square root of 1121576849 is about 33489.9514630881. The cubic root of 1121576849 is about 1038.9859596326.

The spelling of 1121576849 in words is "one billion, one hundred twenty-one million, five hundred seventy-six thousand, eight hundred forty-nine".