6426557 has 2 divisors, whose sum is σ = 6426558. Its totient is φ = 6426556.

The previous prime is 6426523. The next prime is 6426559. The reversal of 6426557 is 7556246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5067001 + 1359556 = 2251^2 + 1166^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6426557 is a prime.

Together with 6426559, 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 (6426559) 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, 3213278 + 3213279.

It is an arithmetic number, because the mean of its divisors is an integer number (3213279).

Almost surely, 2^6426557 is an apocalyptic number.

It is an amenable number.

6426557 is a deficient number, since it is larger than the sum of its proper divisors (1).

6426557 is an equidigital number, since it uses as much as digits as its factorization.

6426557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 35.

The square root of 6426557 is about 2535.0654823890. The cubic root of 6426557 is about 185.9200045257.

The spelling of 6426557 in words is "six million, four hundred twenty-six thousand, five hundred fifty-seven".