6445413 has 20 divisors (see below), whose sum is σ = 10370668. Its totient is φ = 3965760.

The previous prime is 6445409. The next prime is 6445433. The reversal of 6445413 is 3145446.

6445413 is a `hidden beast` number, since 644 + 5 + 4 + 13 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 842724 + 5602689 = 918^2 + 2367^2 .

It is not a de Polignac number, because 6445413 - 2² = 6445409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2008 + ... + 4113.

Almost surely, 2^6445413 is an apocalyptic number.

It is an amenable number.

6445413 is a deficient number, since it is larger than the sum of its proper divisors (3925255).

6445413 is a wasteful number, since it uses less digits than its factorization.

6445413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6146 (or 6137 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 6445413 is about 2538.7817944833. The cubic root of 6445413 is about 186.1016613867.

The spelling of 6445413 in words is "six million, four hundred forty-five thousand, four hundred thirteen".