6426247 has 2 divisors, whose sum is σ = 6426248. Its totient is φ = 6426246.

The previous prime is 6426241. The next prime is 6426257. The reversal of 6426247 is 7426246.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6426247 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 6⁷ + 4⁹ + 2¹¹ + 6⁸ + 2¹³ + 4¹¹ + 7 .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6426241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3213123 + 3213124.

It is an arithmetic number, because the mean of its divisors is an integer number (3213124).

Almost surely, 2^6426247 is an apocalyptic number.

6426247 is a deficient number, since it is larger than the sum of its proper divisors (1).

6426247 is an equidigital number, since it uses as much as digits as its factorization.

6426247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 31.

The square root of 6426247 is about 2535.0043392468. The cubic root of 6426247 is about 185.9170150490.

Subtracting 6426247 from its reverse (7426246), we obtain a palindrome (999999).

It can be divided in two parts, 642 and 6247, that added together give a square (6889 = 83²).

The spelling of 6426247 in words is "six million, four hundred twenty-six thousand, two hundred forty-seven".