2266721 has 8 divisors (see below), whose sum is σ = 2333760. Its totient is φ = 2200752.

The previous prime is 2266717. The next prime is 2266739. The reversal of 2266721 is 1276622.

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 2266721 - 2² = 2266717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2266711) 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, 5891 + ... + 6263.

It is an arithmetic number, because the mean of its divisors is an integer number (291720).

2^2266721 is an apocalyptic number.

It is an amenable number.

2266721 is a deficient number, since it is larger than the sum of its proper divisors (67039).

2266721 is a wasteful number, since it uses less digits than its factorization.

2266721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535.

The product of its digits is 2016, while the sum is 26.

The square root of 2266721 is about 1505.5633497133. The cubic root of 2266721 is about 131.3608719998.

Subtracting from 2266721 its reverse (1276622), we obtain a palindrome (990099).

The spelling of 2266721 in words is "two million, two hundred sixty-six thousand, seven hundred twenty-one".