1171422871 has 2 divisors, whose sum is σ = 1171422872. Its totient is φ = 1171422870.

The previous prime is 1171422851. The next prime is 1171422881. The reversal of 1171422871 is 1782241711.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1171422871 - 2⁹ = 1171422359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1171422851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585711435 + 585711436.

It is an arithmetic number, because the mean of its divisors is an integer number (585711436).

Almost surely, 2^1171422871 is an apocalyptic number.

1171422871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171422871 is an equidigital number, since it uses as much as digits as its factorization.

1171422871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6272, while the sum is 34.

The square root of 1171422871 is about 34226.0554402636. The cubic root of 1171422871 is about 1054.1552264999.

The spelling of 1171422871 in words is "one billion, one hundred seventy-one million, four hundred twenty-two thousand, eight hundred seventy-one".