642265 has 16 divisors (see below), whose sum is σ = 853776. Its totient is φ = 460800.

The previous prime is 642253. The next prime is 642281. The reversal of 642265 is 562246.

It can be written as a sum of positive squares in 8 ways, for example, as 104976 + 537289 = 324^2 + 733^2 .

It is not a de Polignac number, because 642265 - 2⁵ = 642233 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 15 ways as a sum of consecutive naturals, for example, 2545 + ... + 2785.

It is an arithmetic number, because the mean of its divisors is an integer number (53361).

2⁶⁴²²⁶⁵ is an apocalyptic number.

642265 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

642265 is a deficient number, since it is larger than the sum of its proper divisors (211511).

642265 is a wasteful number, since it uses less digits than its factorization.

642265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300.

The product of its digits is 2880, while the sum is 25.

The square root of 642265 is about 801.4143747151. The cubic root of 642265 is about 86.2789302936.

The spelling of 642265 in words is "six hundred forty-two thousand, two hundred sixty-five".