2100685 has 8 divisors (see below), whose sum is σ = 2545920. Its totient is φ = 1663824.

The previous prime is 2100661. The next prime is 2100691. The reversal of 2100685 is 5860012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2100685 - 2⁹ = 2100173 is a prime.

It is an Ulam number.

2100685 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1525 + ... + 2554.

It is an arithmetic number, because the mean of its divisors is an integer number (318240).

2^2100685 is an apocalyptic number.

It is an amenable number.

2100685 is a deficient number, since it is larger than the sum of its proper divisors (445235).

2100685 is a wasteful number, since it uses less digits than its factorization.

2100685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4187.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 2100685 is about 1449.3740028026. The cubic root of 2100685 is about 128.0718387427.

Adding to 2100685 its reverse (5860012), we get a palindrome (7960697).

The spelling of 2100685 in words is "two million, one hundred thousand, six hundred eighty-five".