6425999 has 2 divisors, whose sum is σ = 6426000. Its totient is φ = 6425998.

The previous prime is 6425989. The next prime is 6426001. The reversal of 6425999 is 9995246.

6425999 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6425999 is a prime.

Together with 6426001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6425929) 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, 3212999 + 3213000.

It is an arithmetic number, because the mean of its divisors is an integer number (3213000).

Almost surely, 2^6425999 is an apocalyptic number.

6425999 is a deficient number, since it is larger than the sum of its proper divisors (1).

6425999 is an equidigital number, since it uses as much as digits as its factorization.

6425999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 44.

The square root of 6425999 is about 2534.9554236712. The cubic root of 6425999 is about 185.9146233984.

The spelling of 6425999 in words is "six million, four hundred twenty-five thousand, nine hundred ninety-nine".