12420542 has 8 divisors (see below), whose sum is σ = 18678936. Its totient is φ = 6194232.

The previous prime is 12420521. The next prime is 12420571. The reversal of 12420542 is 24502421.

It is a happy number.

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, 7028 + ... + 8615.

It is an arithmetic number, because the mean of its divisors is an integer number (2334867).

Almost surely, 2^12420542 is an apocalyptic number.

12420542 is a deficient number, since it is larger than the sum of its proper divisors (6258394).

12420542 is a wasteful number, since it uses less digits than its factorization.

12420542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16042.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 12420542 is about 3524.2789333423. The cubic root of 12420542 is about 231.5866475419.

Adding to 12420542 its reverse (24502421), we get a palindrome (36922963).

The spelling of 12420542 in words is "twelve million, four hundred twenty thousand, five hundred forty-two".