7914421 has 2 divisors, whose sum is σ = 7914422. Its totient is φ = 7914420.

The previous prime is 7914409. The next prime is 7914449. The reversal of 7914421 is 1244197.

It is an a-pointer prime, because the next prime (7914449) can be obtained adding 7914421 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7784100 + 130321 = 2790^2 + 361^2 .

It is an emirp because it is prime and its reverse (1244197) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7914421 - 2⁷ = 7914293 is a prime.

7914421 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7914421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7914481) 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, 3957210 + 3957211.

It is an arithmetic number, because the mean of its divisors is an integer number (3957211).

Almost surely, 2^7914421 is an apocalyptic number.

It is an amenable number.

7914421 is a deficient number, since it is larger than the sum of its proper divisors (1).

7914421 is an equidigital number, since it uses as much as digits as its factorization.

7914421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 28.

The square root of 7914421 is about 2813.2580756127. The cubic root of 7914421 is about 199.2842834711.

The spelling of 7914421 in words is "seven million, nine hundred fourteen thousand, four hundred twenty-one".