2282721 has 16 divisors (see below), whose sum is σ = 3529728. Its totient is φ = 1285200.

The previous prime is 2282719. The next prime is 2282737. The reversal of 2282721 is 1272822.

It is a happy number.

It is not a de Polignac number, because 2282721 - 2¹ = 2282719 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2282691 and 2282700.

It is not an unprimeable number, because it can be changed into a prime (2282711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 726 + ... + 2256.

It is an arithmetic number, because the mean of its divisors is an integer number (220608).

2^2282721 is an apocalyptic number.

2282721 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2282721 is a deficient number, since it is larger than the sum of its proper divisors (1247007).

2282721 is a wasteful number, since it uses less digits than its factorization.

2282721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612.

The product of its digits is 896, while the sum is 24.

The square root of 2282721 is about 1510.8676315283. The cubic root of 2282721 is about 131.6692246116.

It can be divided in two parts, 2282 and 721, that added together give a palindrome (3003).

The spelling of 2282721 in words is "two million, two hundred eighty-two thousand, seven hundred twenty-one".