1223279 has 2 divisors, whose sum is σ = 1223280. Its totient is φ = 1223278.

The previous prime is 1223263. The next prime is 1223281. The reversal of 1223279 is 9723221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1223279 - 2⁴ = 1223263 is a prime.

It is a super-3 number, since 3×1223279³ = 5491586333380039917, which contains 333 as substring.

Together with 1223281, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611639 + 611640.

It is an arithmetic number, because the mean of its divisors is an integer number (611640).

2^1223279 is an apocalyptic number.

1223279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223279 is an equidigital number, since it uses as much as digits as its factorization.

1223279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 26.

The square root of 1223279 is about 1106.0194392505. The cubic root of 1223279 is about 106.9486171320.

The spelling of 1223279 in words is "one million, two hundred twenty-three thousand, two hundred seventy-nine".