12129385 has 8 divisors (see below), whose sum is σ = 14599296. Its totient is φ = 9674160.

The previous prime is 12129379. The next prime is 12129407. The reversal of 12129385 is 58392121.

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

It is not a de Polignac number, because 12129385 - 2²¹ = 10032233 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 1761 + ... + 5230.

It is an arithmetic number, because the mean of its divisors is an integer number (1824912).

Almost surely, 2^12129385 is an apocalyptic number.

It is an amenable number.

12129385 is a deficient number, since it is larger than the sum of its proper divisors (2469911).

12129385 is an equidigital number, since it uses as much as digits as its factorization.

12129385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7343.

The product of its digits is 4320, while the sum is 31.

The square root of 12129385 is about 3482.7266616833. The cubic root of 12129385 is about 229.7627357926.

The spelling of 12129385 in words is "twelve million, one hundred twenty-nine thousand, three hundred eighty-five".