12309142 has 8 divisors (see below), whose sum is σ = 18493632. Its totient is φ = 6144600.

The previous prime is 12309133. The next prime is 12309179. The reversal of 12309142 is 24190321.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3334 + ... + 5977.

It is an arithmetic number, because the mean of its divisors is an integer number (2311704).

Almost surely, 2^12309142 is an apocalyptic number.

12309142 is a deficient number, since it is larger than the sum of its proper divisors (6184490).

12309142 is an equidigital number, since it uses as much as digits as its factorization.

12309142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9974.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 12309142 is about 3508.4386840873. The cubic root of 12309142 is about 230.8921993460.

Adding to 12309142 its reverse (24190321), we get a palindrome (36499463).

The spelling of 12309142 in words is "twelve million, three hundred nine thousand, one hundred forty-two".