642175 has 12 divisors (see below), whose sum is σ = 843696. Its totient is φ = 483200.

The previous prime is 642163. The next prime is 642197. The reversal of 642175 is 571246.

It is not a de Polignac number, because 642175 - 2¹¹ = 640127 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a d-powerful number, because it can be written as 6³ + 4² + 1 + 2¹⁹ + 7⁶ + 5 .

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 331 + ... + 1180.

It is an arithmetic number, because the mean of its divisors is an integer number (70308).

2⁶⁴²¹⁷⁵ is an apocalyptic number.

642175 is a deficient number, since it is larger than the sum of its proper divisors (201521).

642175 is a wasteful number, since it uses less digits than its factorization.

642175 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538 (or 1533 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The square root of 642175 is about 801.3582220206. The cubic root of 642175 is about 86.2749000431.

The spelling of 642175 in words is "six hundred forty-two thousand, one hundred seventy-five".