1171275641 has 2 divisors, whose sum is σ = 1171275642. Its totient is φ = 1171275640.

The previous prime is 1171275629. The next prime is 1171275731. The reversal of 1171275641 is 1465721711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1142169616 + 29106025 = 33796^2 + 5395^2 .

It is a cyclic number.

It is not a de Polignac number, because 1171275641 - 2¹⁰ = 1171274617 is a prime.

It is not a weakly prime, because it can be changed into another prime (1171275601) 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, 585637820 + 585637821.

It is an arithmetic number, because the mean of its divisors is an integer number (585637821).

Almost surely, 2^1171275641 is an apocalyptic number.

It is an amenable number.

1171275641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171275641 is an equidigital number, since it uses as much as digits as its factorization.

1171275641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 35.

The square root of 1171275641 is about 34223.9045259304. The cubic root of 1171275641 is about 1054.1110609014. Note that the first 3 decimals are identical.

The spelling of 1171275641 in words is "one billion, one hundred seventy-one million, two hundred seventy-five thousand, six hundred forty-one".