12291729 has 8 divisors (see below), whose sum is σ = 17101632. Its totient is φ = 7838160.

The previous prime is 12291703. The next prime is 12291749. The reversal of 12291729 is 92719221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12291729 - 2¹¹ = 12289681 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12291729.

It is not an unprimeable number, because it can be changed into a prime (12291749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89002 + ... + 89139.

It is an arithmetic number, because the mean of its divisors is an integer number (2137704).

Almost surely, 2^12291729 is an apocalyptic number.

It is an amenable number.

12291729 is a deficient number, since it is larger than the sum of its proper divisors (4809903).

12291729 is a wasteful number, since it uses less digits than its factorization.

12291729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178167.

The product of its digits is 4536, while the sum is 33.

The square root of 12291729 is about 3505.9562176388. The cubic root of 12291729 is about 230.7832715474.

The spelling of 12291729 in words is "twelve million, two hundred ninety-one thousand, seven hundred twenty-nine".