6542447 has 4 divisors (see below), whose sum is σ = 6681696. Its totient is φ = 6403200.

The previous prime is 6542443. The next prime is 6542453. The reversal of 6542447 is 7442456.

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

It is a cyclic number.

It is not a de Polignac number, because 6542447 - 2² = 6542443 is a prime.

It is a super-2 number, since 2×6542447² = 85607225495618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6542443) 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, 69554 + ... + 69647.

It is an arithmetic number, because the mean of its divisors is an integer number (1670424).

Almost surely, 2^6542447 is an apocalyptic number.

6542447 is a deficient number, since it is larger than the sum of its proper divisors (139249).

6542447 is a wasteful number, since it uses less digits than its factorization.

6542447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139248.

The product of its digits is 26880, while the sum is 32.

The square root of 6542447 is about 2557.8207521247. The cubic root of 6542447 is about 187.0309175147.

Subtracting 6542447 from its reverse (7442456), we obtain a palindrome (900009).

The spelling of 6542447 in words is "six million, five hundred forty-two thousand, four hundred forty-seven".