1222265 has 16 divisors (see below), whose sum is σ = 1627776. Its totient is φ = 873600.

The previous prime is 1222259. The next prime is 1222267. The reversal of 1222265 is 5622221.

It is not a de Polignac number, because 1222265 - 2¹⁸ = 960121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1222267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3749 + ... + 4061.

It is an arithmetic number, because the mean of its divisors is an integer number (101736).

2^1222265 is an apocalyptic number.

It is an amenable number.

1222265 is a deficient number, since it is larger than the sum of its proper divisors (405511).

1222265 is a wasteful number, since it uses less digits than its factorization.

1222265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400.

The product of its digits is 480, while the sum is 20.

The square root of 1222265 is about 1105.5609435938. The cubic root of 1222265 is about 106.9190583598.

Adding to 1222265 its reverse (5622221), we get a palindrome (6844486).

It can be divided in two parts, 12222 and 65, that multiplied together give a triangular number (794430 = T₁₂₆₀).

The spelling of 1222265 in words is "one million, two hundred twenty-two thousand, two hundred sixty-five".