2286721 has 4 divisors (see below), whose sum is σ = 2421252. Its totient is φ = 2152192.

The previous prime is 2286701. The next prime is 2286749. The reversal of 2286721 is 1276822.

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 1703025 + 583696 = 1305^2 + 764^2 .

It is a cyclic number.

It is not a de Polignac number, because 2286721 - 2¹¹ = 2284673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2286721.

It is not an unprimeable number, because it can be changed into a prime (2286701) 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, 67240 + ... + 67273.

It is an arithmetic number, because the mean of its divisors is an integer number (605313).

2^2286721 is an apocalyptic number.

It is an amenable number.

2286721 is a deficient number, since it is larger than the sum of its proper divisors (134531).

2286721 is a wasteful number, since it uses less digits than its factorization.

2286721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134530.

The product of its digits is 2688, while the sum is 28.

The square root of 2286721 is about 1512.1907948404. The cubic root of 2286721 is about 131.7460874968.

The spelling of 2286721 in words is "two million, two hundred eighty-six thousand, seven hundred twenty-one".