6438145 has 16 divisors (see below), whose sum is σ = 9135360. Its totient is φ = 4261824.

The previous prime is 6438143. The next prime is 6438151. The reversal of 6438145 is 5418346.

It is a happy number.

It is not a de Polignac number, because 6438145 - 2¹ = 6438143 is a prime.

It is a super-2 number, since 2×6438145² = 82899422082050, which contains 22 as substring.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (6438143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2157 + ... + 4186.

It is an arithmetic number, because the mean of its divisors is an integer number (570960).

Almost surely, 2^6438145 is an apocalyptic number.

It is an amenable number.

6438145 is a deficient number, since it is larger than the sum of its proper divisors (2697215).

6438145 is a wasteful number, since it uses less digits than its factorization.

6438145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6384.

The product of its digits is 11520, while the sum is 31.

The square root of 6438145 is about 2537.3499955662. The cubic root of 6438145 is about 186.0316842005.

The spelling of 6438145 in words is "six million, four hundred thirty-eight thousand, one hundred forty-five".