1223205 has 8 divisors (see below), whose sum is σ = 1957152. Its totient is φ = 652368.

The previous prime is 1223203. The next prime is 1223207. The reversal of 1223205 is 5023221.

It is an interprime number because it is at equal distance from previous prime (1223203) and next prime (1223207).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1223205 - 2¹ = 1223203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 81547 = 1223205 / (1 + 2 + 2 + 3 + 2 + 0 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40759 + ... + 40788.

It is an arithmetic number, because the mean of its divisors is an integer number (244644).

2^1223205 is an apocalyptic number.

1223205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1223205 is a deficient number, since it is larger than the sum of its proper divisors (733947).

1223205 is an equidigital number, since it uses as much as digits as its factorization.

1223205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81555.

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

The square root of 1223205 is about 1105.9859854447. The cubic root of 1223205 is about 106.9464605356.

Adding to 1223205 its reverse (5023221), we get a palindrome (6246426).

The spelling of 1223205 in words is "one million, two hundred twenty-three thousand, two hundred five".