6445147 has 2 divisors, whose sum is σ = 6445148. Its totient is φ = 6445146.

The previous prime is 6445099. The next prime is 6445151. The reversal of 6445147 is 7415446.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6445147 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6445177) 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, 3222573 + 3222574.

It is an arithmetic number, because the mean of its divisors is an integer number (3222574).

Almost surely, 2^6445147 is an apocalyptic number.

6445147 is a deficient number, since it is larger than the sum of its proper divisors (1).

6445147 is an equidigital number, since it uses as much as digits as its factorization.

6445147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 31.

The square root of 6445147 is about 2538.7294066127. The cubic root of 6445147 is about 186.0991012340.

Subtracting 6445147 from its reverse (7415446), we obtain a cube (970299 = 99³).

The spelling of 6445147 in words is "six million, four hundred forty-five thousand, one hundred forty-seven".