10209085 has 4 divisors (see below), whose sum is σ = 12250908. Its totient is φ = 8167264.

The previous prime is 10209071. The next prime is 10209107. The reversal of 10209085 is 58090201.

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 1530169 + 8678916 = 1237^2 + 2946^2 .

It is a cyclic number.

It is not a de Polignac number, because 10209085 - 2⁵ = 10209053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1020904 + ... + 1020913.

It is an arithmetic number, because the mean of its divisors is an integer number (3062727).

Almost surely, 2^10209085 is an apocalyptic number.

It is an amenable number.

10209085 is a deficient number, since it is larger than the sum of its proper divisors (2041823).

10209085 is an equidigital number, since it uses as much as digits as its factorization.

10209085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041822.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 10209085 is about 3195.1658798879. The cubic root of 10209085 is about 216.9346572145.

Adding to 10209085 its reverse (58090201), we get a palindrome (68299286).

The spelling of 10209085 in words is "ten million, two hundred nine thousand, eighty-five".