12420550 has 48 divisors (see below), whose sum is σ = 24306480. Its totient is φ = 4717440.

The previous prime is 12420521. The next prime is 12420571. The reversal of 12420550 is 5502421.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 113896 + ... + 114004.

It is an arithmetic number, because the mean of its divisors is an integer number (506385).

Almost surely, 2^12420550 is an apocalyptic number.

12420550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12420550 is a deficient number, since it is larger than the sum of its proper divisors (11885930).

12420550 is a wasteful number, since it uses less digits than its factorization.

12420550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 12420550 is about 3524.2800683260. The cubic root of 12420550 is about 231.5866972631.

Adding to 12420550 its reverse (5502421), we get a palindrome (17922971).

The spelling of 12420550 in words is "twelve million, four hundred twenty thousand, five hundred fifty".