1222065 has 24 divisors (see below), whose sum is σ = 2282280. Its totient is φ = 601344.

The previous prime is 1222063. The next prime is 1222097. The reversal of 1222065 is 5602221.

It can be written as a sum of positive squares in 4 ways, for example, as 138384 + 1083681 = 372^2 + 1041^2 .

It is not a de Polignac number, because 1222065 - 2¹ = 1222063 is a prime.

It is an Ulam number.

It is a Curzon number.

1222065 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222063) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 460 + ... + 1629.

It is an arithmetic number, because the mean of its divisors is an integer number (95095).

2^1222065 is an apocalyptic number.

1222065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1222065 is a deficient number, since it is larger than the sum of its proper divisors (1060215).

1222065 is a wasteful number, since it uses less digits than its factorization.

1222065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113 (or 2110 counting only the distinct ones).

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

The square root of 1222065 is about 1105.4704880728. The cubic root of 1222065 is about 106.9132262971.

Adding to 1222065 its reverse (5602221), we get a palindrome (6824286).

It can be divided in two parts, 122 and 2065, that added together give a 7-th power (2187 = 3⁷).

The spelling of 1222065 in words is "one million, two hundred twenty-two thousand, sixty-five".