649201 has 6 divisors (see below), whose sum is σ = 755250. Its totient is φ = 556416.

The previous prime is 649183. The next prime is 649217. The reversal of 649201 is 102946.

It can be written as a sum of positive squares in only one way, i.e., 490000 + 159201 = 700^2 + 399^2 .

It is not a de Polignac number, because 649201 - 2⁷ = 649073 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (649261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6576 + ... + 6673.

It is an arithmetic number, because the mean of its divisors is an integer number (125875).

2⁶⁴⁹²⁰¹ is an apocalyptic number.

It is an amenable number.

649201 is a deficient number, since it is larger than the sum of its proper divisors (106049).

649201 is a wasteful number, since it uses less digits than its factorization.

649201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13263 (or 13256 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 649201 is about 805.7301036948. The cubic root of 649201 is about 86.5884023888.

The spelling of 649201 in words is "six hundred forty-nine thousand, two hundred one".