1229279 has 2 divisors, whose sum is σ = 1229280. Its totient is φ = 1229278.

The previous prime is 1229273. The next prime is 1229297. The reversal of 1229279 is 9729221.

Together with next prime (1229297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1229279 - 2⁸ = 1229023 is a prime.

It is a super-2 number, since 2×1229279² = 3022253719682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1229273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614639 + 614640.

It is an arithmetic number, because the mean of its divisors is an integer number (614640).

2^1229279 is an apocalyptic number.

1229279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1229279 is an equidigital number, since it uses as much as digits as its factorization.

1229279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 32.

The square root of 1229279 is about 1108.7285510890. The cubic root of 1229279 is about 107.1231876697.

The spelling of 1229279 in words is "one million, two hundred twenty-nine thousand, two hundred seventy-nine".