6438541 has 4 divisors (see below), whose sum is σ = 6475932. Its totient is φ = 6401152.

The previous prime is 6438539. The next prime is 6438547. The reversal of 6438541 is 1458346.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1458346 = 2 ⋅729173.

It can be written as a sum of positive squares in 2 ways, for example, as 4536900 + 1901641 = 2130^2 + 1379^2 .

It is a cyclic number.

It is not a de Polignac number, because 6438541 - 2¹ = 6438539 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6438547) 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, 18436 + ... + 18781.

It is an arithmetic number, because the mean of its divisors is an integer number (1618983).

Almost surely, 2^6438541 is an apocalyptic number.

It is an amenable number.

6438541 is a deficient number, since it is larger than the sum of its proper divisors (37391).

6438541 is a wasteful number, since it uses less digits than its factorization.

6438541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37390.

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

The square root of 6438541 is about 2537.4280285360. The cubic root of 6438541 is about 186.0354982927.

The spelling of 6438541 in words is "six million, four hundred thirty-eight thousand, five hundred forty-one".