2261785 has 8 divisors (see below), whose sum is σ = 2726856. Its totient is φ = 1800960.

The previous prime is 2261771. The next prime is 2261789. The reversal of 2261785 is 5871622.

It can be written as a sum of positive squares in 4 ways, for example, as 553536 + 1708249 = 744^2 + 1307^2 .

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

It is not a de Polignac number, because 2261785 - 2¹⁹ = 1737497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2261789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267 + ... + 2143.

It is an arithmetic number, because the mean of its divisors is an integer number (340857).

2^2261785 is an apocalyptic number.

It is an amenable number.

2261785 is a deficient number, since it is larger than the sum of its proper divisors (465071).

2261785 is a wasteful number, since it uses less digits than its factorization.

2261785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123.

The product of its digits is 6720, while the sum is 31.

The square root of 2261785 is about 1503.9232028265. The cubic root of 2261785 is about 131.2654524513.

The spelling of 2261785 in words is "two million, two hundred sixty-one thousand, seven hundred eighty-five".