12420450 has 72 divisors (see below), whose sum is σ = 38146368. Its totient is φ = 2838240.

The previous prime is 12420413. The next prime is 12420451. The reversal of 12420450 is 5402421.

12420450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12420451) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1179 + ... + 5121.

Almost surely, 2^12420450 is an apocalyptic number.

12420450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12420450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19073184).

12420450 is an abundant number, since it is smaller than the sum of its proper divisors (25725918).

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

12420450 is a wasteful number, since it uses less digits than its factorization.

12420450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3968 (or 3960 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 12420450 is about 3524.2658810027. The cubic root of 12420450 is about 231.5860757466.

Adding to 12420450 its reverse (5402421), we get a palindrome (17822871).

The spelling of 12420450 in words is "twelve million, four hundred twenty thousand, four hundred fifty".