Adding to 6435 its reverse (5346), we get a triangular number (11781 = T153).
Subtracting from 6435 its reverse (5346), we obtain a square (1089 = 332).
It is a happy number.
6435 is nontrivially palindromic in base 12.
6435 is an admirable number.
It is an Ulam number.
6435 is a lucky number.
It is a nialpdrome in base 3 and base 9.
It is a zygodrome in base 3.
It is an unprimeable number.
26435 is an apocalyptic number.
6435 is a gapful number since it is divisible by the number (65) formed by its first and last digit.
6435 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
6435 is a wasteful number, since it uses less digits than its factorization.
6435 is an evil number, because the sum of its binary digits is even.
The square root of 6435 is about 80.2184517427. The cubic root of 6435 is about 18.6001387433.
The spelling of 6435 in words is "six thousand, four hundred thirty-five".