12009402 has 24 divisors (see below), whose sum is σ = 26263380. Its totient is φ = 3965760.

The previous prime is 12009383. The next prime is 12009407. The reversal of 12009402 is 20490021.

It can be written as a sum of positive squares in 2 ways, for example, as 11840481 + 168921 = 3441^2 + 411^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12009407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1099 + ... + 5022.

Almost surely, 2^12009402 is an apocalyptic number.

12009402 is an abundant number, since it is smaller than the sum of its proper divisors (14253978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12009402 is a wasteful number, since it uses less digits than its factorization.

12009402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6238 (or 6235 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 12009402 is about 3465.4584112351. The cubic root of 12009402 is about 229.0026251423.

Adding to 12009402 its reverse (20490021), we get a palindrome (32499423).

The spelling of 12009402 in words is "twelve million, nine thousand, four hundred two".