1121317857 has 64 divisors (see below), whose sum is σ = 1894752000. Its totient is φ = 649152000.

The previous prime is 1121317849. The next prime is 1121317937. The reversal of 1121317857 is 7587131211.

It is not a de Polignac number, because 1121317857 - 2³ = 1121317849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121317657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 869269 + ... + 870557.

It is an arithmetic number, because the mean of its divisors is an integer number (29605500).

Almost surely, 2^1121317857 is an apocalyptic number.

It is an amenable number.

1121317857 is a deficient number, since it is larger than the sum of its proper divisors (773434143).

1121317857 is a wasteful number, since it uses less digits than its factorization.

1121317857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439 (or 1433 counting only the distinct ones).

The product of its digits is 11760, while the sum is 36.

The square root of 1121317857 is about 33486.0845277557. The cubic root of 1121317857 is about 1038.9059800434.

The spelling of 1121317857 in words is "one billion, one hundred twenty-one million, three hundred seventeen thousand, eight hundred fifty-seven".