12421501 has 2 divisors, whose sum is σ = 12421502. Its totient is φ = 12421500.

The previous prime is 12421481. The next prime is 12421517. The reversal of 12421501 is 10512421.

12421501 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (12421517) can be obtained adding 12421501 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8696601 + 3724900 = 2949^2 + 1930^2 .

It is a cyclic number.

It is not a de Polignac number, because 12421501 - 2¹⁷ = 12290429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12421601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210750 + 6210751.

It is an arithmetic number, because the mean of its divisors is an integer number (6210751).

Almost surely, 2^12421501 is an apocalyptic number.

It is an amenable number.

12421501 is a deficient number, since it is larger than the sum of its proper divisors (1).

12421501 is an equidigital number, since it uses as much as digits as its factorization.

12421501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 12421501 is about 3524.4149869163. The cubic root of 12421501 is about 231.5926077187.

Adding to 12421501 its reverse (10512421), we get a palindrome (22933922).

The spelling of 12421501 in words is "twelve million, four hundred twenty-one thousand, five hundred one".