12042609 has 4 divisors (see below), whose sum is σ = 16056816. Its totient is φ = 8028404.

The previous prime is 12042587. The next prime is 12042619. The reversal of 12042609 is 90624021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12042609 - 2¹⁹ = 11518321 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12042619) 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, 2007099 + ... + 2007104.

It is an arithmetic number, because the mean of its divisors is an integer number (4014204).

Almost surely, 2^12042609 is an apocalyptic number.

It is an amenable number.

12042609 is a deficient number, since it is larger than the sum of its proper divisors (4014207).

12042609 is an equidigital number, since it uses as much as digits as its factorization.

12042609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4014206.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 12042609 is about 3470.2462448651. The cubic root of 12042609 is about 229.2135013626.

The spelling of 12042609 in words is "twelve million, forty-two thousand, six hundred nine".