7284421 has 2 divisors, whose sum is σ = 7284422. Its totient is φ = 7284420.

The previous prime is 7284419. The next prime is 7284443. The reversal of 7284421 is 1244827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5239521 + 2044900 = 2289^2 + 1430^2 .

It is a cyclic number.

It is not a de Polignac number, because 7284421 - 2¹ = 7284419 is a prime.

Together with 7284419, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 7284421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7284401) 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 as a sum of consecutive naturals, namely, 3642210 + 3642211.

It is an arithmetic number, because the mean of its divisors is an integer number (3642211).

Almost surely, 2^7284421 is an apocalyptic number.

It is an amenable number.

7284421 is a deficient number, since it is larger than the sum of its proper divisors (1).

7284421 is an equidigital number, since it uses as much as digits as its factorization.

7284421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3584, while the sum is 28.

The square root of 7284421 is about 2698.9666541104. The cubic root of 7284421 is about 193.8496461415.

The spelling of 7284421 in words is "seven million, two hundred eighty-four thousand, four hundred twenty-one".