648101 has 2 divisors, whose sum is σ = 648102. Its totient is φ = 648100.

The previous prime is 648097. The next prime is 648107. The reversal of 648101 is 101846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 564001 + 84100 = 751^2 + 290^2 .

It is a cyclic number.

It is not a de Polignac number, because 648101 - 2² = 648097 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 648101.

It is not a weakly prime, because it can be changed into another prime (648107) 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, 324050 + 324051.

It is an arithmetic number, because the mean of its divisors is an integer number (324051).

2⁶⁴⁸¹⁰¹ is an apocalyptic number.

It is an amenable number.

648101 is a deficient number, since it is larger than the sum of its proper divisors (1).

648101 is an equidigital number, since it uses as much as digits as its factorization.

648101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 648101 is about 805.0472035850. The cubic root of 648101 is about 86.5394698863.

Adding to 648101 its reverse (101846), we get a palindrome (749947).

The spelling of 648101 in words is "six hundred forty-eight thousand, one hundred one".