12420552 has 32 divisors (see below), whose sum is σ = 32402880. Its totient is φ = 3960000.

The previous prime is 12420521. The next prime is 12420571. The reversal of 12420552 is 25502421.

It is a happy number.

12420552 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12420552² = 308540223969408, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10699 + ... + 11802.

It is an arithmetic number, because the mean of its divisors is an integer number (1012590).

Almost surely, 2^12420552 is an apocalyptic number.

12420552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12420552 is an abundant number, since it is smaller than the sum of its proper divisors (19982328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12420552 is a wasteful number, since it uses less digits than its factorization.

12420552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22533 (or 22529 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 12420552 is about 3524.2803520719. The cubic root of 12420552 is about 231.5867096934.

Adding to 12420552 its reverse (25502421), we get a palindrome (37922973).

The spelling of 12420552 in words is "twelve million, four hundred twenty thousand, five hundred fifty-two".