10001685 has 32 divisors (see below), whose sum is σ = 16745472. Its totient is φ = 5091840.

The previous prime is 10001659. The next prime is 10001687. The reversal of 10001685 is 58610001.

It is not a de Polignac number, because 10001685 - 2¹¹ = 9999637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001687) 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 in 31 ways as a sum of consecutive naturals, for example, 63627 + ... + 63783.

It is an arithmetic number, because the mean of its divisors is an integer number (523296).

Almost surely, 2^10001685 is an apocalyptic number.

10001685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10001685 is a deficient number, since it is larger than the sum of its proper divisors (6743787).

10001685 is a wasteful number, since it uses less digits than its factorization.

10001685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 10001685 is about 3162.5440708392. The cubic root of 10001685 is about 215.4555690651.

Adding to 10001685 its reverse (58610001), we get a palindrome (68611686).

The spelling of 10001685 in words is "ten million, one thousand, six hundred eighty-five".