647201 has 2 divisors, whose sum is σ = 647202. Its totient is φ = 647200.

The previous prime is 647189. The next prime is 647209. The reversal of 647201 is 102746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 616225 + 30976 = 785^2 + 176^2 .

It is a cyclic number.

It is not a de Polignac number, because 647201 - 2¹⁸ = 385057 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (647209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323600 + 323601.

It is an arithmetic number, because the mean of its divisors is an integer number (323601).

2⁶⁴⁷²⁰¹ is an apocalyptic number.

It is an amenable number.

647201 is a deficient number, since it is larger than the sum of its proper divisors (1).

647201 is an equidigital number, since it uses as much as digits as its factorization.

647201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 647201 is about 804.4880359583. The cubic root of 647201 is about 86.4993930036.

Adding to 647201 its reverse (102746), we get a palindrome (749947).

It can be divided in two parts, 647 and 201, that added together give a palindrome (848).

The spelling of 647201 in words is "six hundred forty-seven thousand, two hundred one".