6724561 has 4 divisors (see below), whose sum is σ = 6789952. Its totient is φ = 6659172.

The previous prime is 6724511. The next prime is 6724583. The reversal of 6724561 is 1654276.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6724561 - 2¹⁵ = 6691793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6724511) 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 3 ways as a sum of consecutive naturals, for example, 32541 + ... + 32746.

It is an arithmetic number, because the mean of its divisors is an integer number (1697488).

Almost surely, 2^6724561 is an apocalyptic number.

It is an amenable number.

6724561 is a deficient number, since it is larger than the sum of its proper divisors (65391).

6724561 is a wasteful number, since it uses less digits than its factorization.

6724561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65390.

The product of its digits is 10080, while the sum is 31.

The square root of 6724561 is about 2593.1758521165. The cubic root of 6724561 is about 188.7504428158.

The spelling of 6724561 in words is "six million, seven hundred twenty-four thousand, five hundred sixty-one".