1157261113 has 2 divisors, whose sum is σ = 1157261114. Its totient is φ = 1157261112.

The previous prime is 1157261089. The next prime is 1157261141. The reversal of 1157261113 is 3111627511.

It is an a-pointer prime, because the next prime (1157261141) can be obtained adding 1157261113 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1071383824 + 85877289 = 32732^2 + 9267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1157261113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1157261143) 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 as a sum of consecutive naturals, namely, 578630556 + 578630557.

It is an arithmetic number, because the mean of its divisors is an integer number (578630557).

Almost surely, 2^1157261113 is an apocalyptic number.

It is an amenable number.

1157261113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157261113 is an equidigital number, since it uses as much as digits as its factorization.

1157261113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 28.

The square root of 1157261113 is about 34018.5407241404. The cubic root of 1157261113 is about 1049.8899697250.

Adding to 1157261113 its reverse (3111627511), we get a palindrome (4268888624).

It can be divided in two parts, 11572 and 61113, that multiplied together give a triangular number (707199636 = T₃₇₆₀₈).

The spelling of 1157261113 in words is "one billion, one hundred fifty-seven million, two hundred sixty-one thousand, one hundred thirteen".