2112785 has 4 divisors (see below), whose sum is σ = 2535348. Its totient is φ = 1690224.

The previous prime is 2112779. The next prime is 2112793. The reversal of 2112785 is 5872112.

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 309136 + 1803649 = 556^2 + 1343^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112785 - 2¹⁴ = 2096401 is a prime.

It is an Ulam number.

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, 211274 + ... + 211283.

It is an arithmetic number, because the mean of its divisors is an integer number (633837).

2^2112785 is an apocalyptic number.

It is an amenable number.

2112785 is a deficient number, since it is larger than the sum of its proper divisors (422563).

2112785 is an equidigital number, since it uses as much as digits as its factorization.

2112785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422562.

The product of its digits is 1120, while the sum is 26.

The square root of 2112785 is about 1453.5422250489. The cubic root of 2112785 is about 128.3172671554.

Adding to 2112785 its reverse (5872112), we get a palindrome (7984897).

It can be divided in two parts, 21127 and 85, that added together give a palindrome (21212).

The spelling of 2112785 in words is "two million, one hundred twelve thousand, seven hundred eighty-five".