12421530 has 48 divisors (see below), whose sum is σ = 35234784. Its totient is φ = 3011040.

The previous prime is 12421517. The next prime is 12421537. The reversal of 12421530 is 3512421.

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

It is not an unprimeable number, because it can be changed into a prime (12421537) 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 23 ways as a sum of consecutive naturals, for example, 5284 + ... + 7263.

It is an arithmetic number, because the mean of its divisors is an integer number (734058).

Almost surely, 2^12421530 is an apocalyptic number.

12421530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12421530 is an abundant number, since it is smaller than the sum of its proper divisors (22813254).

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

12421530 is a wasteful number, since it uses less digits than its factorization.

12421530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12571 (or 12568 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 12421530 is about 3524.4191010718. The cubic root of 12421530 is about 231.5927879487.

Adding to 12421530 its reverse (3512421), we get a palindrome (15933951).

It can be divided in two parts, 1242 and 1530, that added together give a palindrome (2772).

The spelling of 12421530 in words is "twelve million, four hundred twenty-one thousand, five hundred thirty".