12420142 has 8 divisors (see below), whose sum is σ = 21291696. Its totient is φ = 5322912.

The previous prime is 12420139. The next prime is 12420151. The reversal of 12420142 is 24102421.

12420142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 443563 + ... + 443590.

It is an arithmetic number, because the mean of its divisors is an integer number (2661462).

Almost surely, 2^12420142 is an apocalyptic number.

12420142 is a deficient number, since it is larger than the sum of its proper divisors (8871554).

12420142 is an equidigital number, since it uses as much as digits as its factorization.

12420142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887162.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 12420142 is about 3524.2221836882. Note that the first 3 decimals coincide. The cubic root of 12420142 is about 231.5841614547.

Adding to 12420142 its reverse (24102421), we get a palindrome (36522563).

The spelling of 12420142 in words is "twelve million, four hundred twenty thousand, one hundred forty-two".