It is a happy number.
642312 is nontrivially palindromic in base 15.
It is a nude number because it is divisible by every one of its digits.
It is a d-powerful number, because it can be written as 62 + 48 + 39 + 215 + 1 + 219 .
It is an unprimeable number.
642312 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2642312 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 642312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (950040).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
642312 is a wasteful number, since it uses less digits than its factorization.
642312 is an evil number, because the sum of its binary digits is even.
The square root of 642312 is about 801.4436973363. The cubic root of 642312 is about 86.2810348303.
Adding to 642312 its reverse (213246), we get a palindrome (855558).
The spelling of 642312 in words is "six hundred forty-two thousand, three hundred twelve".