1222305 has 24 divisors (see below), whose sum is σ = 2276352. Its totient is φ = 558432.

The previous prime is 1222279. The next prime is 1222307. The reversal of 1222305 is 5032221.

1222305 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 1222305 - 2⁶ = 1222241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1222307) 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, 97 + ... + 1566.

It is an arithmetic number, because the mean of its divisors is an integer number (94848).

2^1222305 is an apocalyptic number.

1222305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1222305 is a deficient number, since it is larger than the sum of its proper divisors (1054047).

1222305 is a wasteful number, since it uses less digits than its factorization.

1222305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685 (or 1678 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 1222305 is about 1105.5790338099. The cubic root of 1222305 is about 106.9202246960.

Adding to 1222305 its reverse (5032221), we get a palindrome (6254526).

The spelling of 1222305 in words is "one million, two hundred twenty-two thousand, three hundred five".