2785081 has 4 divisors (see below), whose sum is σ = 2999332. Its totient is φ = 2570832.

The previous prime is 2785051. The next prime is 2785087. The reversal of 2785081 is 1805872.

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 839056 + 1946025 = 916^2 + 1395^2 .

It is a cyclic number.

It is not a de Polignac number, because 2785081 - 2⁹ = 2784569 is a prime.

It is a super-2 number, since 2×2785081² = 15513352353122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2785087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107106 + ... + 107131.

It is an arithmetic number, because the mean of its divisors is an integer number (749833).

2^2785081 is an apocalyptic number.

It is an amenable number.

2785081 is a deficient number, since it is larger than the sum of its proper divisors (214251).

2785081 is a wasteful number, since it uses less digits than its factorization.

2785081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214250.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 2785081 is about 1668.8561951229. The cubic root of 2785081 is about 140.6951985978.

The spelling of 2785081 in words is "two million, seven hundred eighty-five thousand, eighty-one".