12129965 has 8 divisors (see below), whose sum is σ = 14577408. Its totient is φ = 9689680.

The previous prime is 12129937. The next prime is 12129989. The reversal of 12129965 is 56992121.

12129965 is nontrivially palindromic in base 14.

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

It is not a de Polignac number, because 12129965 - 2¹⁴ = 12113581 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 3224 + ... + 5886.

It is an arithmetic number, because the mean of its divisors is an integer number (1822176).

Almost surely, 2^12129965 is an apocalyptic number.

It is an amenable number.

12129965 is a deficient number, since it is larger than the sum of its proper divisors (2447443).

12129965 is an equidigital number, since it uses as much as digits as its factorization.

12129965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3579.

The product of its digits is 9720, while the sum is 35.

The square root of 12129965 is about 3482.8099287788. The cubic root of 12129965 is about 229.7663979806.

The spelling of 12129965 in words is "twelve million, one hundred twenty-nine thousand, nine hundred sixty-five".