6405213 has 8 divisors (see below), whose sum is σ = 8584000. Its totient is φ = 4248288.

The previous prime is 6405187. The next prime is 6405221. The reversal of 6405213 is 3125046.

It is a happy number.

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

It is not a de Polignac number, because 6405213 - 2⁶ = 6405149 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6405213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6405263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4768 + ... + 5961.

It is an arithmetic number, because the mean of its divisors is an integer number (1073000).

Almost surely, 2^6405213 is an apocalyptic number.

It is an amenable number.

6405213 is a deficient number, since it is larger than the sum of its proper divisors (2178787).

6405213 is a wasteful number, since it uses less digits than its factorization.

6405213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10931.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 6405213 is about 2530.8522280054. The cubic root of 6405213 is about 185.7139492527.

The spelling of 6405213 in words is "six million, four hundred five thousand, two hundred thirteen".