2266781 has 8 divisors (see below), whose sum is σ = 2485728. Its totient is φ = 2050000.

The previous prime is 2266777. The next prime is 2266783. The reversal of 2266781 is 1876622.

2266781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2266781 - 2² = 2266777 is a prime.

It is a super-2 number, since 2×2266781² = 10276592203922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2266783) 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 7 ways as a sum of consecutive naturals, for example, 2351 + ... + 3171.

It is an arithmetic number, because the mean of its divisors is an integer number (310716).

2^2266781 is an apocalyptic number.

It is an amenable number.

2266781 is a deficient number, since it is larger than the sum of its proper divisors (218947).

2266781 is a wasteful number, since it uses less digits than its factorization.

2266781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083.

The product of its digits is 8064, while the sum is 32.

The square root of 2266781 is about 1505.5832756776. The cubic root of 2266781 is about 131.3620310283.

It can be divided in two parts, 226 and 6781, that added together give a palindrome (7007).

The spelling of 2266781 in words is "two million, two hundred sixty-six thousand, seven hundred eighty-one".