6435 has 24 divisors (see below), whose sum is σ = 13104. Its totient is φ = 2880.

The previous prime is 6427. The next prime is 6449. The reversal of 6435 is 5346.

Added to its reverse (5346) it gives a triangular number (11781 = T₁₅₃).

It is a happy number.

6435 is nontrivially palindromic in base 12.

6435 is a nontrivial binomial coefficient, being equal to C(15, 7).

6435 is an admirable number.

It is not a de Polignac number, because 6435 - 2³ = 6427 is a prime.

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.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 489 + ... + 501.

It is an arithmetic number, because the mean of its divisors is an integer number (546).

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.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6552).

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 sum of its prime factors is 35 (or 32 counting only the distinct ones).

The product of its digits is 360, while the sum is 18.

The square root of 6435 is about 80.2184517427. The cubic root of 6435 is about 18.6001387433.

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 can be divided in two parts, 64 and 35, that added together give a palindrome (99).

The spelling of 6435 in words is "six thousand, four hundred thirty-five".