6561479 has 8 divisors (see below), whose sum is σ = 6945840. Its totient is φ = 6181056.

The previous prime is 6561461. The next prime is 6561481. The reversal of 6561479 is 9741656.

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

It is a cyclic number.

It is not a de Polignac number, because 6561479 - 2⁸ = 6561223 is a prime.

It is an Ulam 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 (6561679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2867 + ... + 4619.

It is an arithmetic number, because the mean of its divisors is an integer number (868230).

Almost surely, 2^6561479 is an apocalyptic number.

6561479 is a deficient number, since it is larger than the sum of its proper divisors (384361).

6561479 is a wasteful number, since it uses less digits than its factorization.

6561479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1969.

The product of its digits is 45360, while the sum is 38.

The square root of 6561479 is about 2561.5384049434. The cubic root of 6561479 is about 187.2120997944.

The spelling of 6561479 in words is "six million, five hundred sixty-one thousand, four hundred seventy-nine".