4812421 has 2 divisors, whose sum is σ = 4812422. Its totient is φ = 4812420.

The previous prime is 4812419. The next prime is 4812427. The reversal of 4812421 is 1242184.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4730625 + 81796 = 2175^2 + 286^2 .

It is a cyclic number.

It is not a de Polignac number, because 4812421 - 2¹ = 4812419 is a prime.

Together with 4812419, it forms a pair of twin primes.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 4812392 and 4812401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4812427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2406210 + 2406211.

It is an arithmetic number, because the mean of its divisors is an integer number (2406211).

Almost surely, 2^4812421 is an apocalyptic number.

It is an amenable number.

4812421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4812421 is an equidigital number, since it uses as much as digits as its factorization.

4812421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 512, while the sum is 22.

The square root of 4812421 is about 2193.7230910031. The cubic root of 4812421 is about 168.8319115824.

The spelling of 4812421 in words is "four million, eight hundred twelve thousand, four hundred twenty-one".