2104705 has 4 divisors (see below), whose sum is σ = 2525652. Its totient is φ = 1683760.

The previous prime is 2104703. The next prime is 2104717. The reversal of 2104705 is 5074012.

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 998001 + 1106704 = 999^2 + 1052^2 .

It is not a de Polignac number, because 2104705 - 2¹ = 2104703 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2104703) 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, 210466 + ... + 210475.

It is an arithmetic number, because the mean of its divisors is an integer number (631413).

2^2104705 is an apocalyptic number.

It is an amenable number.

2104705 is a deficient number, since it is larger than the sum of its proper divisors (420947).

2104705 is an equidigital number, since it uses as much as digits as its factorization.

2104705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420946.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 2104705 is about 1450.7601455789. The cubic root of 2104705 is about 128.1534820678.

Adding to 2104705 its reverse (5074012), we get a palindrome (7178717).

It can be divided in two parts, 2104 and 705, that added together give a square (2809 = 53²).

The spelling of 2104705 in words is "two million, one hundred four thousand, seven hundred five".