10011985 has 4 divisors (see below), whose sum is σ = 12014388. Its totient is φ = 8009584.

The previous prime is 10011979. The next prime is 10012001. The reversal of 10011985 is 58911001.

10011985 is nontrivially palindromic in base 11.

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 3504384 + 6507601 = 1872^2 + 2551^2 .

It is a cyclic number.

It is not a de Polignac number, because 10011985 - 2⁷ = 10011857 is a prime.

It is a Duffinian 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, 1001194 + ... + 1001203.

It is an arithmetic number, because the mean of its divisors is an integer number (3003597).

Almost surely, 2^10011985 is an apocalyptic number.

It is an amenable number.

10011985 is a deficient number, since it is larger than the sum of its proper divisors (2002403).

10011985 is an equidigital number, since it uses as much as digits as its factorization.

10011985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2002402.

The product of its (nonzero) digits is 360, while the sum is 25.

The square root of 10011985 is about 3164.1720876084. The cubic root of 10011985 is about 215.5295043071.

Adding to 10011985 its reverse (58911001), we get a palindrome (68922986).

The spelling of 10011985 in words is "ten million, eleven thousand, nine hundred eighty-five".