6442567 has 2 divisors, whose sum is σ = 6442568. Its totient is φ = 6442566.

The previous prime is 6442559. The next prime is 6442571. The reversal of 6442567 is 7652446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6442567 - 2³ = 6442559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6442367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3221283 + 3221284.

It is an arithmetic number, because the mean of its divisors is an integer number (3221284).

Almost surely, 2^6442567 is an apocalyptic number.

6442567 is a deficient number, since it is larger than the sum of its proper divisors (1).

6442567 is an equidigital number, since it uses as much as digits as its factorization.

6442567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 34.

The square root of 6442567 is about 2538.2212275529. The cubic root of 6442567 is about 186.0742660228.

The spelling of 6442567 in words is "six million, four hundred forty-two thousand, five hundred sixty-seven".