7842229 has 2 divisors, whose sum is σ = 7842230. Its totient is φ = 7842228.

The previous prime is 7842227. The next prime is 7842239. The reversal of 7842229 is 9222487.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6838225 + 1004004 = 2615^2 + 1002^2 .

It is an emirp because it is prime and its reverse (9222487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7842229 - 2¹ = 7842227 is a prime.

Together with 7842227, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 7842194 and 7842203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7842227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3921114 + 3921115.

It is an arithmetic number, because the mean of its divisors is an integer number (3921115).

Almost surely, 2^7842229 is an apocalyptic number.

It is an amenable number.

7842229 is a deficient number, since it is larger than the sum of its proper divisors (1).

7842229 is an equidigital number, since it uses as much as digits as its factorization.

7842229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The square root of 7842229 is about 2800.3980074268. The cubic root of 7842229 is about 198.6765027611.

The spelling of 7842229 in words is "seven million, eight hundred forty-two thousand, two hundred twenty-nine".