6402 is nontrivially palindromic in base 5.
It is a plaindrome in base 7.
It is a congruent number.
It is an unprimeable number.
6402 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
26402 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 6402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7056).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
6402 is a wasteful number, since it uses less digits than its factorization.
6402 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 113.
The square root of 6402 is about 80.0124990236. The cubic root of 6402 is about 18.5682891284.
Adding to 6402 its reverse (2046), we get a palindrome (8448).
Subtracting from 6402 its reverse (2046), we obtain a square (4356 = 662).
The spelling of 6402 in words is "six thousand, four hundred two".