2221065 has 48 divisors (see below), whose sum is σ = 4807296. Its totient is φ = 921600.

The previous prime is 2221061. The next prime is 2221069. The reversal of 2221065 is 5601222.

It is an interprime number because it is at equal distance from previous prime (2221061) and next prime (2221069).

It is not a de Polignac number, because 2221065 - 2² = 2221061 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2221061) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3145 + ... + 3785.

It is an arithmetic number, because the mean of its divisors is an integer number (100152).

2^2221065 is an apocalyptic number.

It is an amenable number.

2221065 is an abundant number, since it is smaller than the sum of its proper divisors (2586231).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2221065 is a wasteful number, since it uses less digits than its factorization.

2221065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2221065 is about 1490.3237903221. The cubic root of 2221065 is about 130.4729322467.

Adding to 2221065 its reverse (5601222), we get a palindrome (7822287).

It can be divided in two parts, 222106 and 5, that added together give a triangular number (222111 = T₆₆₆).

The spelling of 2221065 in words is "two million, two hundred twenty-one thousand, sixty-five".