2271289 has 4 divisors (see below), whose sum is σ = 2292624. Its totient is φ = 2249956.

The previous prime is 2271287. The next prime is 2271301. The reversal of 2271289 is 9821722.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2271289 - 2¹ = 2271287 is a prime.

It is a Duffinian number.

2271289 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2271289.

It is not an unprimeable number, because it can be changed into a prime (2271281) 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, 10507 + ... + 10720.

It is an arithmetic number, because the mean of its divisors is an integer number (573156).

2^2271289 is an apocalyptic number.

It is an amenable number.

2271289 is a deficient number, since it is larger than the sum of its proper divisors (21335).

2271289 is a wasteful number, since it uses less digits than its factorization.

2271289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21334.

The product of its digits is 4032, while the sum is 31.

The square root of 2271289 is about 1507.0796262972. The cubic root of 2271289 is about 131.4490542723.

It can be divided in two parts, 22712 and 89, that added together give a square (22801 = 151²).

The spelling of 2271289 in words is "two million, two hundred seventy-one thousand, two hundred eighty-nine".