1157171087 has 2 divisors, whose sum is σ = 1157171088. Its totient is φ = 1157171086.

The previous prime is 1157171083. The next prime is 1157171111. The reversal of 1157171087 is 7801717511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1157171087 - 2² = 1157171083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1157171087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1157171083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578585543 + 578585544.

It is an arithmetic number, because the mean of its divisors is an integer number (578585544).

Almost surely, 2^1157171087 is an apocalyptic number.

1157171087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157171087 is an equidigital number, since it uses as much as digits as its factorization.

1157171087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13720, while the sum is 38.

The square root of 1157171087 is about 34017.2175081972. The cubic root of 1157171087 is about 1049.8627445683.

Adding to 1157171087 its reverse (7801717511), we get a palindrome (8958888598).

The spelling of 1157171087 in words is "one billion, one hundred fifty-seven million, one hundred seventy-one thousand, eighty-seven".