12740042 has 8 divisors (see below), whose sum is σ = 21840096. Its totient is φ = 5460012.

The previous prime is 12740017. The next prime is 12740059. The reversal of 12740042 is 24004721.

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

It is a junction number, because it is equal to n+sod(n) for n = 12739996 and 12740023.

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 in 3 ways as a sum of consecutive naturals, for example, 454988 + ... + 455015.

It is an arithmetic number, because the mean of its divisors is an integer number (2730012).

Almost surely, 2^12740042 is an apocalyptic number.

12740042 is a deficient number, since it is larger than the sum of its proper divisors (9100054).

12740042 is an equidigital number, since it uses as much as digits as its factorization.

12740042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910012.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 12740042 is about 3569.3195429942. The cubic root of 12740042 is about 233.5556009046. Note that the first 3 decimals are identical.

Adding to 12740042 its reverse (24004721), we get a palindrome (36744763).

The spelling of 12740042 in words is "twelve million, seven hundred forty thousand, forty-two".