6561371 has 16 divisors (see below), whose sum is σ = 7366464. Its totient is φ = 5812224.

The previous prime is 6561319. The next prime is 6561383. The reversal of 6561371 is 1731656.

It is a cyclic number.

It is not a de Polignac number, because 6561371 - 2⁶ = 6561307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6561311) 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, 37841 + ... + 38013.

It is an arithmetic number, because the mean of its divisors is an integer number (460404).

Almost surely, 2^6561371 is an apocalyptic number.

6561371 is a deficient number, since it is larger than the sum of its proper divisors (805093).

6561371 is a wasteful number, since it uses less digits than its factorization.

6561371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310.

The product of its digits is 3780, while the sum is 29.

The square root of 6561371 is about 2561.5173237751. The cubic root of 6561371 is about 187.2110726369.

The spelling of 6561371 in words is "six million, five hundred sixty-one thousand, three hundred seventy-one".