12291229 has 8 divisors (see below), whose sum is σ = 12560760. Its totient is φ = 12024576.

The previous prime is 12291211. The next prime is 12291259. The reversal of 12291229 is 92219221.

It can be written as a sum of positive squares in 4 ways, for example, as 6400900 + 5890329 = 2530^2 + 2427^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12291229 - 2⁷ = 12291101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12291197 and 12291206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12291259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9387 + ... + 10615.

It is an arithmetic number, because the mean of its divisors is an integer number (1570095).

Almost surely, 2^12291229 is an apocalyptic number.

It is an amenable number.

12291229 is a deficient number, since it is larger than the sum of its proper divisors (269531).

12291229 is a wasteful number, since it uses less digits than its factorization.

12291229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439.

The product of its digits is 1296, while the sum is 28.

The square root of 12291229 is about 3505.8849096911. The cubic root of 12291229 is about 230.7801422561.

The spelling of 12291229 in words is "twelve million, two hundred ninety-one thousand, two hundred twenty-nine".