6406571 has 2 divisors, whose sum is σ = 6406572. Its totient is φ = 6406570.

The previous prime is 6406549. The next prime is 6406573. The reversal of 6406571 is 1756046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6406571 - 2⁶ = 6406507 is a prime.

Together with 6406573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6406573) 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, 3203285 + 3203286.

It is an arithmetic number, because the mean of its divisors is an integer number (3203286).

Almost surely, 2^6406571 is an apocalyptic number.

6406571 is a deficient number, since it is larger than the sum of its proper divisors (1).

6406571 is an equidigital number, since it uses as much as digits as its factorization.

6406571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 6406571 is about 2531.1205028603. The cubic root of 6406571 is about 185.7270730277.

The spelling of 6406571 in words is "six million, four hundred six thousand, five hundred seventy-one".