12042947 has 4 divisors (see below), whose sum is σ = 13763376. Its totient is φ = 10322520.

The previous prime is 12042931. The next prime is 12042983. The reversal of 12042947 is 74924021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12042947 - 2⁴ = 12042931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12042907) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 860204 + ... + 860217.

It is an arithmetic number, because the mean of its divisors is an integer number (3440844).

Almost surely, 2^12042947 is an apocalyptic number.

12042947 is a deficient number, since it is larger than the sum of its proper divisors (1720429).

12042947 is an equidigital number, since it uses as much as digits as its factorization.

12042947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1720428.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 12042947 is about 3470.2949442374. The cubic root of 12042947 is about 229.2156457882.

Adding to 12042947 its reverse (74924021), we get a palindrome (86966968).

The spelling of 12042947 in words is "twelve million, forty-two thousand, nine hundred forty-seven".