10581985 has 4 divisors (see below), whose sum is σ = 12698388. Its totient is φ = 8465584.

The previous prime is 10581959. The next prime is 10582043. The reversal of 10581985 is 58918501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2702736 + 7879249 = 1644^2 + 2807^2 .

It is a cyclic number.

It is not a de Polignac number, because 10581985 - 2⁵ = 10581953 is a prime.

It is a super-2 number, since 2×10581985² = 223956813080450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1058194 + ... + 1058203.

It is an arithmetic number, because the mean of its divisors is an integer number (3174597).

Almost surely, 2^10581985 is an apocalyptic number.

It is an amenable number.

10581985 is a deficient number, since it is larger than the sum of its proper divisors (2116403).

10581985 is an equidigital number, since it uses as much as digits as its factorization.

10581985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116402.

The product of its (nonzero) digits is 14400, while the sum is 37.

The square root of 10581985 is about 3252.9963110954. The cubic root of 10581985 is about 219.5444084196.

The spelling of 10581985 in words is "ten million, five hundred eighty-one thousand, nine hundred eighty-five".