640175 has 12 divisors (see below), whose sum is σ = 822120. Its totient is φ = 493920.

The previous prime is 640163. The next prime is 640193. The reversal of 640175 is 571046.

It is not a de Polignac number, because 640175 - 2¹⁰ = 639151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 640175.

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 284 + ... + 1166.

It is an arithmetic number, because the mean of its divisors is an integer number (68510).

2⁶⁴⁰¹⁷⁵ is an apocalyptic number.

640175 is a deficient number, since it is larger than the sum of its proper divisors (181945).

640175 is a wasteful number, since it uses less digits than its factorization.

640175 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922 (or 917 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 640175 is about 800.1093675242. The cubic root of 640175 is about 86.1852415953.

The spelling of 640175 in words is "six hundred forty thousand, one hundred seventy-five".