12421000 has 32 divisors (see below), whose sum is σ = 29067480. Its totient is φ = 4968000.

The previous prime is 12420979. The next prime is 12421007. The reversal of 12421000 is 12421.

12421000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7322436 + 5098564 = 2706^2 + 2258^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (12421007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5211 + ... + 7210.

Almost surely, 2^12421000 is an apocalyptic number.

12421000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12421000 is an abundant number, since it is smaller than the sum of its proper divisors (16646480).

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

12421000 is a wasteful number, since it uses less digits than its factorization.

12421000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12442 (or 12428 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 12421000 is about 3524.3439105740. The cubic root of 12421000 is about 231.5894940463.

Adding to 12421000 its reverse (12421), we get a palindrome (12433421).

12421000 divided by its reverse (12421) gives a cube (1000 = 10³).

The spelling of 12421000 in words is "twelve million, four hundred twenty-one thousand".