1222279 has 2 divisors, whose sum is σ = 1222280. Its totient is φ = 1222278.

The previous prime is 1222271. The next prime is 1222307. The reversal of 1222279 is 9722221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1222279 - 2³ = 1222271 is a prime.

It is equal to p₉₄₅₀₇ and since 1222279 and 94507 have the same sum of digits, it is a Honaker prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611139 + 611140.

It is an arithmetic number, because the mean of its divisors is an integer number (611140).

2^1222279 is an apocalyptic number.

1222279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222279 is an equidigital number, since it uses as much as digits as its factorization.

1222279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 25.

The square root of 1222279 is about 1105.5672752031. The cubic root of 1222279 is about 106.9194665803.

It can be divided in two parts, 122 and 2279, that added together give a 4-th power (2401 = 7⁴).

The spelling of 1222279 in words is "one million, two hundred twenty-two thousand, two hundred seventy-nine".