2805485 has 4 divisors (see below), whose sum is σ = 3366588. Its totient is φ = 2244384.

The previous prime is 2805461. The next prime is 2805487. The reversal of 2805485 is 5845082.

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 1295044 + 1510441 = 1138^2 + 1229^2 .

It is a cyclic number.

It is not a de Polignac number, because 2805485 - 2¹⁸ = 2543341 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 (2805487) 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, 280544 + ... + 280553.

It is an arithmetic number, because the mean of its divisors is an integer number (841647).

2^2805485 is an apocalyptic number.

It is an amenable number.

2805485 is a deficient number, since it is larger than the sum of its proper divisors (561103).

2805485 is an equidigital number, since it uses as much as digits as its factorization.

2805485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561102.

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 2805485 is about 1674.9582084339. The cubic root of 2805485 is about 141.0379489759.

It can be divided in two parts, 2805 and 485, that multiplied together give a triangular number (1360425 = T₁₆₄₉).

The spelling of 2805485 in words is "two million, eight hundred five thousand, four hundred eighty-five".