12421541 has 16 divisors (see below), whose sum is σ = 14636160. Its totient is φ = 10422720.

The previous prime is 12421537. The next prime is 12421553. The reversal of 12421541 is 14512421.

It is a happy number.

It is not a de Polignac number, because 12421541 - 2² = 12421537 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421501) 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 15 ways as a sum of consecutive naturals, for example, 6491 + ... + 8183.

It is an arithmetic number, because the mean of its divisors is an integer number (914760).

Almost surely, 2^12421541 is an apocalyptic number.

12421541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12421541 is a deficient number, since it is larger than the sum of its proper divisors (2214619).

12421541 is a wasteful number, since it uses less digits than its factorization.

12421541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756.

The product of its digits is 320, while the sum is 20.

The square root of 12421541 is about 3524.4206616123. The cubic root of 12421541 is about 231.5928563117.

Adding to 12421541 its reverse (14512421), we get a palindrome (26933962).

The spelling of 12421541 in words is "twelve million, four hundred twenty-one thousand, five hundred forty-one".