12420127 has 4 divisors (see below), whose sum is σ = 12449376. Its totient is φ = 12390880.

The previous prime is 12420097. The next prime is 12420131. The reversal of 12420127 is 72102421.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12420127 - 2¹¹ = 12418079 is a prime.

It is a super-2 number, since 2×12420127² = 308519109392258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420137) 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, 13978 + ... + 14839.

It is an arithmetic number, because the mean of its divisors is an integer number (3112344).

Almost surely, 2^12420127 is an apocalyptic number.

12420127 is a deficient number, since it is larger than the sum of its proper divisors (29249).

12420127 is an equidigital number, since it uses as much as digits as its factorization.

12420127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29248.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 12420127 is about 3524.2200555584. The cubic root of 12420127 is about 231.5840682254.

Adding to 12420127 its reverse (72102421), we get a palindrome (84522548).

The spelling of 12420127 in words is "twelve million, four hundred twenty thousand, one hundred twenty-seven".