1166031521 has 2 divisors, whose sum is σ = 1166031522. Its totient is φ = 1166031520.

The previous prime is 1166031499. The next prime is 1166031569. The reversal of 1166031521 is 1251306611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 940280896 + 225750625 = 30664^2 + 15025^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166031521 - 2⁶ = 1166031457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1166031571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583015760 + 583015761.

It is an arithmetic number, because the mean of its divisors is an integer number (583015761).

Almost surely, 2^1166031521 is an apocalyptic number.

It is an amenable number.

1166031521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166031521 is an equidigital number, since it uses as much as digits as its factorization.

1166031521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1166031521 is about 34147.2037068923. The cubic root of 1166031521 is about 1052.5355264346.

The spelling of 1166031521 in words is "one billion, one hundred sixty-six million, thirty-one thousand, five hundred twenty-one".