1222445 has 16 divisors (see below), whose sum is σ = 1710720. Its totient is φ = 821184.

The previous prime is 1222433. The next prime is 1222471. The reversal of 1222445 is 5442221.

It is a happy number.

It is not a de Polignac number, because 1222445 - 2¹⁰ = 1221421 is a prime.

It is a Curzon number.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

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, 1526 + ... + 2184.

It is an arithmetic number, because the mean of its divisors is an integer number (106920).

2^1222445 is an apocalyptic number.

It is an amenable number.

1222445 is a deficient number, since it is larger than the sum of its proper divisors (488275).

1222445 is an equidigital number, since it uses as much as digits as its factorization.

1222445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724.

The product of its digits is 640, while the sum is 20.

The square root of 1222445 is about 1105.6423472353. The cubic root of 1222445 is about 106.9243066722.

Adding to 1222445 its reverse (5442221), we get a palindrome (6664666).

The spelling of 1222445 in words is "one million, two hundred twenty-two thousand, four hundred forty-five".