6405869 has 8 divisors (see below), whose sum is σ = 6776640. Its totient is φ = 6038496.

The previous prime is 6405829. The next prime is 6405877. The reversal of 6405869 is 9685046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6405869 is a prime.

It is a super-2 number, since 2×6405869² = 82070315290322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6405829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3704 + ... + 5150.

It is an arithmetic number, because the mean of its divisors is an integer number (847080).

Almost surely, 2^6405869 is an apocalyptic number.

It is an amenable number.

6405869 is a deficient number, since it is larger than the sum of its proper divisors (370771).

6405869 is a wasteful number, since it uses less digits than its factorization.

6405869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 6405869 is about 2530.9818253002. The cubic root of 6405869 is about 185.7202890987.

The spelling of 6405869 in words is "six million, four hundred five thousand, eight hundred sixty-nine".