642235 has 8 divisors (see below), whose sum is σ = 840816. Its totient is φ = 467040.

The previous prime is 642233. The next prime is 642241. The reversal of 642235 is 532246.

642235 = 15² + 16² + ... + 124².

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 642235 - 2¹ = 642233 is a prime.

It is a Duffinian number.

642235 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (642233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5784 + ... + 5893.

It is an arithmetic number, because the mean of its divisors is an integer number (105102).

2⁶⁴²²³⁵ is an apocalyptic number.

642235 is a deficient number, since it is larger than the sum of its proper divisors (198581).

642235 is a wasteful number, since it uses less digits than its factorization.

642235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11693.

The product of its digits is 1440, while the sum is 22.

The square root of 642235 is about 801.3956575874. The cubic root of 642235 is about 86.2775869186.

The spelling of 642235 in words is "six hundred forty-two thousand, two hundred thirty-five".