1170581 has 2 divisors, whose sum is σ = 1170582. Its totient is φ = 1170580.

The previous prime is 1170563. The next prime is 1170583. The reversal of 1170581 is 1850711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1136356 + 34225 = 1066^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 1170581 - 2⁶ = 1170517 is a prime.

It is a super-2 number, since 2×1170581² = 2740519755122, which contains 22 as substring.

Together with 1170583, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1170583) 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, 585290 + 585291.

It is an arithmetic number, because the mean of its divisors is an integer number (585291).

2^1170581 is an apocalyptic number.

It is an amenable number.

1170581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1170581 is an equidigital number, since it uses as much as digits as its factorization.

1170581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 23.

The square root of 1170581 is about 1081.9339166511. The cubic root of 1170581 is about 105.3902634710.

The spelling of 1170581 in words is "one million, one hundred seventy thousand, five hundred eighty-one".