1161043157 has 2 divisors, whose sum is σ = 1161043158. Its totient is φ = 1161043156.

The previous prime is 1161043061. The next prime is 1161043187. The reversal of 1161043157 is 7513401611.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 875804836 + 285238321 = 29594^2 + 16889^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161043157 - 2⁸ = 1161042901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161043187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580521578 + 580521579.

It is an arithmetic number, because the mean of its divisors is an integer number (580521579).

Almost surely, 2^1161043157 is an apocalyptic number.

It is an amenable number.

1161043157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161043157 is an equidigital number, since it uses as much as digits as its factorization.

1161043157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 1161043157 is about 34074.0833625792. The cubic root of 1161043157 is about 1051.0324408789.

Adding to 1161043157 its reverse (7513401611), we get a palindrome (8674444768).

The spelling of 1161043157 in words is "one billion, one hundred sixty-one million, forty-three thousand, one hundred fifty-seven".