6405456 has 20 divisors (see below), whose sum is σ = 16547552. Its totient is φ = 2135136.

The previous prime is 6405397. The next prime is 6405457. The reversal of 6405456 is 6545046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6405457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66676 + ... + 66771.

Almost surely, 2^6405456 is an apocalyptic number.

It is an amenable number.

6405456 is an abundant number, since it is smaller than the sum of its proper divisors (10142096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6405456 is a wasteful number, since it uses less digits than its factorization.

6405456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133458 (or 133452 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 6405456 is about 2530.9002350942. The cubic root of 6405456 is about 185.7162977522.

The spelling of 6405456 in words is "six million, four hundred five thousand, four hundred fifty-six".