642275 has 12 divisors (see below), whose sum is σ = 831792. Its totient is φ = 491040.

The previous prime is 642253. The next prime is 642281. The reversal of 642275 is 572246.

It is not a de Polignac number, because 642275 - 2⁶ = 642211 is a prime.

It is a Duffinian 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, 17 + ... + 1133.

It is an arithmetic number, because the mean of its divisors is an integer number (69316).

2⁶⁴²²⁷⁵ is an apocalyptic number.

642275 is a deficient number, since it is larger than the sum of its proper divisors (189517).

642275 is a wasteful number, since it uses less digits than its factorization.

642275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150 (or 1145 counting only the distinct ones).

The product of its digits is 3360, while the sum is 26.

The square root of 642275 is about 801.4206136605. The cubic root of 642275 is about 86.2793780760.

The spelling of 642275 in words is "six hundred forty-two thousand, two hundred seventy-five".