12420454 has 8 divisors (see below), whose sum is σ = 18936288. Its totient is φ = 6108360.

The previous prime is 12420451. The next prime is 12420469. The reversal of 12420454 is 45402421.

It is a happy number.

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

It is a super-2 number, since 2×12420454² = 308535355132232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420451) 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, 50782 + ... + 51025.

It is an arithmetic number, because the mean of its divisors is an integer number (2367036).

Almost surely, 2^12420454 is an apocalyptic number.

12420454 is a deficient number, since it is larger than the sum of its proper divisors (6515834).

12420454 is a wasteful number, since it uses less digits than its factorization.

12420454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101870.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 12420454 is about 3524.2664484968. The cubic root of 12420454 is about 231.5861006073.

Adding to 12420454 its reverse (45402421), we get a palindrome (57822875).

The spelling of 12420454 in words is "twelve million, four hundred twenty thousand, four hundred fifty-four".