12960409 has 16 divisors (see below), whose sum is σ = 17110656. Its totient is φ = 9504000.

The previous prime is 12960407. The next prime is 12960457. The reversal of 12960409 is 90406921.

It is a happy number.

It is not a de Polignac number, because 12960409 - 2¹ = 12960407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12960401) 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 15 ways as a sum of consecutive naturals, for example, 3642 + ... + 6259.

It is an arithmetic number, because the mean of its divisors is an integer number (1069416).

Almost surely, 2^12960409 is an apocalyptic number.

It is an amenable number.

12960409 is a deficient number, since it is larger than the sum of its proper divisors (4150247).

12960409 is a wasteful number, since it uses less digits than its factorization.

12960409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9936.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 12960409 is about 3600.0568051074. The cubic root of 12960409 is about 234.8945294023.

The spelling of 12960409 in words is "twelve million, nine hundred sixty thousand, four hundred nine".