7420447 has 2 divisors, whose sum is σ = 7420448. Its totient is φ = 7420446.

The previous prime is 7420411. The next prime is 7420459. The reversal of 7420447 is 7440247.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7420447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7427447) 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, 3710223 + 3710224.

It is an arithmetic number, because the mean of its divisors is an integer number (3710224).

Almost surely, 2^7420447 is an apocalyptic number.

7420447 is a deficient number, since it is larger than the sum of its proper divisors (1).

7420447 is an equidigital number, since it uses as much as digits as its factorization.

7420447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6272, while the sum is 28.

The square root of 7420447 is about 2724.0497425708. The cubic root of 7420447 is about 195.0488328281.

The spelling of 7420447 in words is "seven million, four hundred twenty thousand, four hundred forty-seven".