640301 has 4 divisors (see below), whose sum is σ = 643104. Its totient is φ = 637500.

The previous prime is 640279. The next prime is 640303. The reversal of 640301 is 103046.

640301 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-640301 is a prime.

It is a Duffinian number.

It is a Curzon number.

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 640301.

It is not an unprimeable number, because it can be changed into a prime (640303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1025 + ... + 1526.

It is an arithmetic number, because the mean of its divisors is an integer number (160776).

2⁶⁴⁰³⁰¹ is an apocalyptic number.

It is an amenable number.

640301 is a deficient number, since it is larger than the sum of its proper divisors (2803).

640301 is a wasteful number, since it uses less digits than its factorization.

640301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2802.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 640301 is about 800.1881028858. The cubic root of 640301 is about 86.1908955847.

Adding to 640301 its reverse (103046), we get a palindrome (743347).

The spelling of 640301 in words is "six hundred forty thousand, three hundred one".