642075 has 24 divisors (see below), whose sum is σ = 1214208. Its totient is φ = 293280.

The previous prime is 642071. The next prime is 642077. The reversal of 642075 is 570246.

It is a happy number.

642075 is digitally balanced in base 2 and base 7, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 642075 - 2² = 642071 is a prime.

642075 is strictly pandigital in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87 + ... + 1136.

It is an arithmetic number, because the mean of its divisors is an integer number (50592).

2⁶⁴²⁰⁷⁵ is an apocalyptic number.

642075 is a deficient number, since it is larger than the sum of its proper divisors (572133).

642075 is a wasteful number, since it uses less digits than its factorization.

642075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243 (or 1238 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 642075 is about 801.2958255226. The cubic root of 642075 is about 86.2704215454.

The spelling of 642075 in words is "six hundred forty-two thousand, seventy-five".