1222851 has 8 divisors (see below), whose sum is σ = 1863424. Its totient is φ = 698760.

The previous prime is 1222847. The next prime is 1222853. The reversal of 1222851 is 1582221.

It is a happy number.

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

It is not a de Polignac number, because 1222851 - 2² = 1222847 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 58231 = 1222851 / (1 + 2 + 2 + 2 + 8 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222853) 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, 29095 + ... + 29136.

It is an arithmetic number, because the mean of its divisors is an integer number (232928).

2^1222851 is an apocalyptic number.

1222851 is a deficient number, since it is larger than the sum of its proper divisors (640573).

1222851 is an equidigital number, since it uses as much as digits as its factorization.

1222851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58241.

The product of its digits is 320, while the sum is 21.

The square root of 1222851 is about 1105.8259356698. The cubic root of 1222851 is about 106.9361426412.

The spelling of 1222851 in words is "one million, two hundred twenty-two thousand, eight hundred fifty-one".