1222811 has 2 divisors, whose sum is σ = 1222812. Its totient is φ = 1222810.

The previous prime is 1222801. The next prime is 1222829. The reversal of 1222811 is 1182221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1222811 - 2¹⁸ = 960667 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1222811.

It is not a weakly prime, because it can be changed into another prime (1222801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611405 + 611406.

It is an arithmetic number, because the mean of its divisors is an integer number (611406).

2^1222811 is an apocalyptic number.

1222811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222811 is an equidigital number, since it uses as much as digits as its factorization.

1222811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64, while the sum is 17.

The square root of 1222811 is about 1105.8078494928. The cubic root of 1222811 is about 106.9349766523.

The spelling of 1222811 in words is "one million, two hundred twenty-two thousand, eight hundred eleven".