12144742 has 4 divisors (see below), whose sum is σ = 18217116. Its totient is φ = 6072370.

The previous prime is 12144739. The next prime is 12144751. The reversal of 12144742 is 24744121.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3036184 + ... + 3036187.

It is an arithmetic number, because the mean of its divisors is an integer number (4554279).

Almost surely, 2^12144742 is an apocalyptic number.

12144742 is a deficient number, since it is larger than the sum of its proper divisors (6072374).

12144742 is an equidigital number, since it uses as much as digits as its factorization.

12144742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6072373.

The product of its digits is 1792, while the sum is 25.

The square root of 12144742 is about 3484.9307023239. The cubic root of 12144742 is about 229.8596623406.

Adding to 12144742 its reverse (24744121), we get a palindrome (36888863).

The spelling of 12144742 in words is "twelve million, one hundred forty-four thousand, seven hundred forty-two".