6456409 has 4 divisors (see below), whose sum is σ = 6796240. Its totient is φ = 6116580.

The previous prime is 6456403. The next prime is 6456419. The reversal of 6456409 is 9046546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6456409 - 2¹¹ = 6454361 is a prime.

It is a super-5 number, since 5×6456409⁵ (a number of 35 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6456403) 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, 169887 + ... + 169924.

It is an arithmetic number, because the mean of its divisors is an integer number (1699060).

Almost surely, 2^6456409 is an apocalyptic number.

It is an amenable number.

6456409 is a deficient number, since it is larger than the sum of its proper divisors (339831).

6456409 is a wasteful number, since it uses less digits than its factorization.

6456409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339830.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 6456409 is about 2540.9464772010. The cubic root of 6456409 is about 186.2074322789.

The spelling of 6456409 in words is "six million, four hundred fifty-six thousand, four hundred nine".