2205869 has 4 divisors (see below), whose sum is σ = 2335644. Its totient is φ = 2076096.

The previous prime is 2205839. The next prime is 2205883. The reversal of 2205869 is 9685022.

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 855625 + 1350244 = 925^2 + 1162^2 .

It is a cyclic number.

It is not a de Polignac number, because 2205869 - 2⁸ = 2205613 is a prime.

It is a super-2 number, since 2×2205869² = 9731716090322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2205839) 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, 64862 + ... + 64895.

It is an arithmetic number, because the mean of its divisors is an integer number (583911).

2^2205869 is an apocalyptic number.

It is an amenable number.

2205869 is a deficient number, since it is larger than the sum of its proper divisors (129775).

2205869 is a wasteful number, since it uses less digits than its factorization.

2205869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129774.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 2205869 is about 1485.2168191884. The cubic root of 2205869 is about 130.1746961019.

The spelling of 2205869 in words is "two million, two hundred five thousand, eight hundred sixty-nine".