6409145 has 8 divisors (see below), whose sum is σ = 7956360. Its totient is φ = 4950400.

The previous prime is 6409141. The next prime is 6409163. The reversal of 6409145 is 5419046.

It can be written as a sum of positive squares in 4 ways, for example, as 139129 + 6270016 = 373^2 + 2504^2 .

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

It is not a de Polignac number, because 6409145 - 2² = 6409141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6409141) 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, 21956 + ... + 22245.

It is an arithmetic number, because the mean of its divisors is an integer number (994545).

Almost surely, 2^6409145 is an apocalyptic number.

It is an amenable number.

6409145 is a deficient number, since it is larger than the sum of its proper divisors (1547215).

6409145 is a wasteful number, since it uses less digits than its factorization.

6409145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44235.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 6409145 is about 2531.6289222554. The cubic root of 6409145 is about 185.7519431949.

Subtracting from 6409145 its reverse (5419046), we obtain a palindrome (990099).

The spelling of 6409145 in words is "six million, four hundred nine thousand, one hundred forty-five".