2881705 has 4 divisors (see below), whose sum is σ = 3458052. Its totient is φ = 2305360.

The previous prime is 2881699. The next prime is 2881709. The reversal of 2881705 is 5071882.

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 1806336 + 1075369 = 1344^2 + 1037^2 .

It is not a de Polignac number, because 2881705 - 2¹³ = 2873513 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

2881705 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2881709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288166 + ... + 288175.

It is an arithmetic number, because the mean of its divisors is an integer number (864513).

2^2881705 is an apocalyptic number.

It is an amenable number.

2881705 is a deficient number, since it is larger than the sum of its proper divisors (576347).

2881705 is an equidigital number, since it uses as much as digits as its factorization.

2881705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576346.

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

The square root of 2881705 is about 1697.5585409641. The cubic root of 2881705 is about 142.3038030441.

The spelling of 2881705 in words is "two million, eight hundred eighty-one thousand, seven hundred five".