6406217 has 4 divisors (see below), whose sum is σ = 6579396. Its totient is φ = 6233040.

The previous prime is 6406199. The next prime is 6406219. The reversal of 6406217 is 7126046.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5707321 + 698896 = 2389^2 + 836^2 .

It is a cyclic number.

It is not a de Polignac number, because 6406217 - 2²⁰ = 5357641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6406219) 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, 86534 + ... + 86607.

It is an arithmetic number, because the mean of its divisors is an integer number (1644849).

Almost surely, 2^6406217 is an apocalyptic number.

It is an amenable number.

6406217 is a deficient number, since it is larger than the sum of its proper divisors (173179).

6406217 is a wasteful number, since it uses less digits than its factorization.

6406217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173178.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 6406217 is about 2531.0505723908. The cubic root of 6406217 is about 185.7236521340.

The spelling of 6406217 in words is "six million, four hundred six thousand, two hundred seventeen".