1157841857 has 2 divisors, whose sum is σ = 1157841858. Its totient is φ = 1157841856.

The previous prime is 1157841833. The next prime is 1157841887. The reversal of 1157841857 is 7581487511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1109622721 + 48219136 = 33311^2 + 6944^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1157841857 is a prime.

It is not a weakly prime, because it can be changed into another prime (1157841887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578920928 + 578920929.

It is an arithmetic number, because the mean of its divisors is an integer number (578920929).

Almost surely, 2^1157841857 is an apocalyptic number.

It is an amenable number.

1157841857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157841857 is an equidigital number, since it uses as much as digits as its factorization.

1157841857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 313600, while the sum is 47.

The square root of 1157841857 is about 34027.0753518430. The cubic root of 1157841857 is about 1050.0655611369.

It can be divided in two parts, 11578 and 41857, that added together give a palindrome (53435).

The spelling of 1157841857 in words is "one billion, one hundred fifty-seven million, eight hundred forty-one thousand, eight hundred fifty-seven".