1222835729 has 4 divisors (see below), whose sum is σ = 1222910976. Its totient is φ = 1222760484.

The previous prime is 1222835717. The next prime is 1222835741. The reversal of 1222835729 is 9275382221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (1222835717) and next prime (1222835741).

It is a cyclic number.

It is not a de Polignac number, because 1222835729 - 2⁸ = 1222835473 is a prime.

It is a super-2 number, since 2×1222835729² = 2990654440237922882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222835749) 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, 2009 + ... + 49494.

It is an arithmetic number, because the mean of its divisors is an integer number (305727744).

Almost surely, 2^1222835729 is an apocalyptic number.

It is an amenable number.

1222835729 is a deficient number, since it is larger than the sum of its proper divisors (75247).

1222835729 is an equidigital number, since it uses as much as digits as its factorization.

1222835729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75246.

The product of its digits is 120960, while the sum is 41.

The square root of 1222835729 is about 34969.0681746025. The cubic root of 1222835729 is about 1069.3569749880.

The spelling of 1222835729 in words is "one billion, two hundred twenty-two million, eight hundred thirty-five thousand, seven hundred twenty-nine".