2291705 has 8 divisors (see below), whose sum is σ = 2961672. Its totient is φ = 1692288.

The previous prime is 2291699. The next prime is 2291717. The reversal of 2291705 is 5071922.

It can be written as a sum of positive squares in 4 ways, for example, as 92416 + 2199289 = 304^2 + 1483^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2291705 - 2²⁰ = 1243129 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17564 + ... + 17693.

It is an arithmetic number, because the mean of its divisors is an integer number (370209).

2^2291705 is an apocalyptic number.

It is an amenable number.

2291705 is a deficient number, since it is larger than the sum of its proper divisors (669967).

2291705 is a wasteful number, since it uses less digits than its factorization.

2291705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35275.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 2291705 is about 1513.8378380791. The cubic root of 2291705 is about 131.8417333338.

The spelling of 2291705 in words is "two million, two hundred ninety-one thousand, seven hundred five".