12420553 has 8 divisors (see below), whose sum is σ = 12879360. Its totient is φ = 11965440.

The previous prime is 12420521. The next prime is 12420571. The reversal of 12420553 is 35502421.

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

It is a cyclic number.

It is not a de Polignac number, because 12420553 - 2⁵ = 12420521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12420853) 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 7 ways as a sum of consecutive naturals, for example, 7188 + ... + 8746.

It is an arithmetic number, because the mean of its divisors is an integer number (1609920).

Almost surely, 2^12420553 is an apocalyptic number.

It is an amenable number.

12420553 is a deficient number, since it is larger than the sum of its proper divisors (458807).

12420553 is a wasteful number, since it uses less digits than its factorization.

12420553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 12420553 is about 3524.2804939448. The cubic root of 12420553 is about 231.5867159086.

Adding to 12420553 its reverse (35502421), we get a palindrome (47922974).

The spelling of 12420553 in words is "twelve million, four hundred twenty thousand, five hundred fifty-three".