2204861 has 4 divisors (see below), whose sum is σ = 2221824. Its totient is φ = 2187900.

The previous prime is 2204843. The next prime is 2204863. The reversal of 2204861 is 1684022.

2204861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2204861 is a prime.

It is a super-2 number, since 2×2204861² = 9722824058642, 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 (2204863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8285 + ... + 8546.

It is an arithmetic number, because the mean of its divisors is an integer number (555456).

2^2204861 is an apocalyptic number.

It is an amenable number.

2204861 is a deficient number, since it is larger than the sum of its proper divisors (16963).

2204861 is a wasteful number, since it uses less digits than its factorization.

2204861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16962.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 2204861 is about 1484.8774360196. The cubic root of 2204861 is about 130.1548647511.

Adding to 2204861 its reverse (1684022), we get a palindrome (3888883).

The spelling of 2204861 in words is "two million, two hundred four thousand, eight hundred sixty-one".