1222819 has 4 divisors (see below), whose sum is σ = 1316896. Its totient is φ = 1128744.

The previous prime is 1222811. The next prime is 1222829. The reversal of 1222819 is 9182221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9182221 = 23 ⋅399227.

It is a cyclic number.

It is not a de Polignac number, because 1222819 - 2³ = 1222811 is a prime.

It is a super-2 number, since 2×1222819² = 2990572613522, which contains 22 as substring.

It is a Duffinian number.

1222819 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1222793 and 1222802.

It is not an unprimeable number, because it can be changed into a prime (1222811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47019 + ... + 47044.

It is an arithmetic number, because the mean of its divisors is an integer number (329224).

2^1222819 is an apocalyptic number.

1222819 is a deficient number, since it is larger than the sum of its proper divisors (94077).

1222819 is an equidigital number, since it uses as much as digits as its factorization.

1222819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94076.

The product of its digits is 576, while the sum is 25.

The square root of 1222819 is about 1105.8114667519. The cubic root of 1222819 is about 106.9352098521.

The spelling of 1222819 in words is "one million, two hundred twenty-two thousand, eight hundred nineteen".