6390257 has 2 divisors, whose sum is σ = 6390258. Its totient is φ = 6390256.

The previous prime is 6390239. The next prime is 6390281. The reversal of 6390257 is 7520936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3671056 + 2719201 = 1916^2 + 1649^2 .

It is a cyclic number.

It is not a de Polignac number, because 6390257 - 2⁸ = 6390001 is a prime.

It is not a weakly prime, because it can be changed into another prime (6390227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3195128 + 3195129.

It is an arithmetic number, because the mean of its divisors is an integer number (3195129).

Almost surely, 2^6390257 is an apocalyptic number.

It is an amenable number.

6390257 is a deficient number, since it is larger than the sum of its proper divisors (1).

6390257 is an equidigital number, since it uses as much as digits as its factorization.

6390257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 6390257 is about 2527.8957652562. The cubic root of 6390257 is about 185.5692909117.

The spelling of 6390257 in words is "six million, three hundred ninety thousand, two hundred fifty-seven".