1222865 has 8 divisors (see below), whose sum is σ = 1677120. Its totient is φ = 838512.

The previous prime is 1222853. The next prime is 1222889. The reversal of 1222865 is 5682221.

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

It is a cyclic number.

It is not a de Polignac number, because 1222865 - 2⁶ = 1222801 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17435 + ... + 17504.

It is an arithmetic number, because the mean of its divisors is an integer number (209640).

2^1222865 is an apocalyptic number.

It is an amenable number.

1222865 is a deficient number, since it is larger than the sum of its proper divisors (454255).

1222865 is an equidigital number, since it uses as much as digits as its factorization.

1222865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34951.

The product of its digits is 1920, while the sum is 26.

The square root of 1222865 is about 1105.8322657619. The cubic root of 1222865 is about 106.9365507314.

The spelling of 1222865 in words is "one million, two hundred twenty-two thousand, eight hundred sixty-five".