6427409 has 4 divisors (see below), whose sum is σ = 6432804. Its totient is φ = 6422016.

The previous prime is 6427367. The next prime is 6427433. The reversal of 6427409 is 9047246.

6427409 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1123600 + 5303809 = 1060^2 + 2303^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6427409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6427439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32 + ... + 3585.

It is an arithmetic number, because the mean of its divisors is an integer number (1608201).

Almost surely, 2^6427409 is an apocalyptic number.

It is an amenable number.

6427409 is a deficient number, since it is larger than the sum of its proper divisors (5395).

6427409 is a wasteful number, since it uses less digits than its factorization.

6427409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5394.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 6427409 is about 2535.2335198163. The cubic root of 6427409 is about 185.9282202699.

The spelling of 6427409 in words is "six million, four hundred twenty-seven thousand, four hundred nine".