6561372 has 12 divisors (see below), whose sum is σ = 15309896. Its totient is φ = 2187120.

The previous prime is 6561319. The next prime is 6561383. The reversal of 6561372 is 2731656.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273379 + ... + 273402.

Almost surely, 2^6561372 is an apocalyptic number.

It is an amenable number.

6561372 is an abundant number, since it is smaller than the sum of its proper divisors (8748524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6561372 is a wasteful number, since it uses less digits than its factorization.

6561372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546788 (or 546786 counting only the distinct ones).

The product of its digits is 7560, while the sum is 30.

The square root of 6561372 is about 2561.5175189719. The cubic root of 6561372 is about 187.2110821476.

The spelling of 6561372 in words is "six million, five hundred sixty-one thousand, three hundred seventy-two".