12129091 has 8 divisors (see below), whose sum is σ = 13483904. Its totient is φ = 10834560.

The previous prime is 12129083. The next prime is 12129101. The reversal of 12129091 is 19092121.

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 12129091 - 2³ = 12129083 is a prime.

It is a super-2 number, since 2×12129091² = 294229696972562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12129031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14646 + ... + 15451.

It is an arithmetic number, because the mean of its divisors is an integer number (1685488).

Almost surely, 2^12129091 is an apocalyptic number.

12129091 is a deficient number, since it is larger than the sum of its proper divisors (1354813).

12129091 is a wasteful number, since it uses less digits than its factorization.

12129091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30141.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 12129091 is about 3482.6844531195. The cubic root of 12129091 is about 229.7608793976.

The spelling of 12129091 in words is "twelve million, one hundred twenty-nine thousand, ninety-one".