1167581 has 2 divisors, whose sum is σ = 1167582. Its totient is φ = 1167580.

The previous prime is 1167571. The next prime is 1167587. The reversal of 1167581 is 1857611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 765625 + 401956 = 875^2 + 634^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1167581 is a prime.

It is a super-2 number, since 2×1167581² = 2726490783122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1167587) 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, 583790 + 583791.

It is an arithmetic number, because the mean of its divisors is an integer number (583791).

2^1167581 is an apocalyptic number.

It is an amenable number.

1167581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1167581 is an equidigital number, since it uses as much as digits as its factorization.

1167581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 29.

The square root of 1167581 is about 1080.5466209285. The cubic root of 1167581 is about 105.3001540089.

The spelling of 1167581 in words is "one million, one hundred sixty-seven thousand, five hundred eighty-one".