2261806 has 8 divisors (see below), whose sum is σ = 3475584. Its totient is φ = 1103280.

The previous prime is 2261803. The next prime is 2261807. The reversal of 2261806 is 6081622.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261801) 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, 13710 + ... + 13873.

It is an arithmetic number, because the mean of its divisors is an integer number (434448).

2^2261806 is an apocalyptic number.

2261806 is a deficient number, since it is larger than the sum of its proper divisors (1213778).

2261806 is a wasteful number, since it uses less digits than its factorization.

2261806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27626.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 2261806 is about 1503.9301845498. The cubic root of 2261806 is about 131.2658587035.

It can be divided in two parts, 226 and 1806, that multiplied together give a triangular number (408156 = T₉₀₃).

The spelling of 2261806 in words is "two million, two hundred sixty-one thousand, eight hundred six".