2103685 has 4 divisors (see below), whose sum is σ = 2524428. Its totient is φ = 1682944.

The previous prime is 2103683. The next prime is 2103713. The reversal of 2103685 is 5863012.

It is a happy number.

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 917764 + 1185921 = 958^2 + 1089^2 .

It is a cyclic number.

It is not a de Polignac number, because 2103685 - 2¹ = 2103683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2103683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210364 + ... + 210373.

It is an arithmetic number, because the mean of its divisors is an integer number (631107).

2^2103685 is an apocalyptic number.

It is an amenable number.

2103685 is a deficient number, since it is larger than the sum of its proper divisors (420743).

2103685 is an equidigital number, since it uses as much as digits as its factorization.

2103685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420742.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2103685 is about 1450.4085631297. The cubic root of 2103685 is about 128.1327764465.

Adding to 2103685 its reverse (5863012), we get a palindrome (7966697).

The spelling of 2103685 in words is "two million, one hundred three thousand, six hundred eighty-five".