1171142849 has 2 divisors, whose sum is σ = 1171142850. Its totient is φ = 1171142848.

The previous prime is 1171142837. The next prime is 1171142897. The reversal of 1171142849 is 9482411711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1106227600 + 64915249 = 33260^2 + 8057^2 .

It is a cyclic number.

It is not a de Polignac number, because 1171142849 - 2⁸ = 1171142593 is a prime.

It is not a weakly prime, because it can be changed into another prime (1171142809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585571424 + 585571425.

It is an arithmetic number, because the mean of its divisors is an integer number (585571425).

Almost surely, 2^1171142849 is an apocalyptic number.

It is an amenable number.

1171142849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171142849 is an equidigital number, since it uses as much as digits as its factorization.

1171142849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 38.

The square root of 1171142849 is about 34221.9644234518. The cubic root of 1171142849 is about 1054.0712231947.

The spelling of 1171142849 in words is "one billion, one hundred seventy-one million, one hundred forty-two thousand, eight hundred forty-nine".