1222264279 has 4 divisors (see below), whose sum is σ = 1222481560. Its totient is φ = 1222047000.

The previous prime is 1222264273. The next prime is 1222264313. The reversal of 1222264279 is 9724622221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1222264279 - 2³ = 1222264271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222264271) 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, 99972 + ... + 111529.

It is an arithmetic number, because the mean of its divisors is an integer number (305620390).

Almost surely, 2^1222264279 is an apocalyptic number.

1222264279 is a deficient number, since it is larger than the sum of its proper divisors (217281).

1222264279 is an equidigital number, since it uses as much as digits as its factorization.

1222264279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217280.

The product of its digits is 48384, while the sum is 37.

The square root of 1222264279 is about 34960.8964272943. The cubic root of 1222264279 is about 1069.1903733633.

The spelling of 1222264279 in words is "one billion, two hundred twenty-two million, two hundred sixty-four thousand, two hundred seventy-nine".