7421213 has 2 divisors, whose sum is σ = 7421214. Its totient is φ = 7421212.

The previous prime is 7421207. The next prime is 7421237. The reversal of 7421213 is 3121247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7300804 + 120409 = 2702^2 + 347^2 .

It is a cyclic number.

It is not a de Polignac number, because 7421213 - 2¹⁴ = 7404829 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p₅₀₃₃₀₉ and since 7421213 and 503309 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7421263) 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, 3710606 + 3710607.

It is an arithmetic number, because the mean of its divisors is an integer number (3710607).

Almost surely, 2^7421213 is an apocalyptic number.

It is an amenable number.

7421213 is a deficient number, since it is larger than the sum of its proper divisors (1).

7421213 is an equidigital number, since it uses as much as digits as its factorization.

7421213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 20.

The square root of 7421213 is about 2724.1903384309. The cubic root of 7421213 is about 195.0555441159.

The spelling of 7421213 in words is "seven million, four hundred twenty-one thousand, two hundred thirteen".