6561922 has 4 divisors (see below), whose sum is σ = 9842886. Its totient is φ = 3280960.

The previous prime is 6561911. The next prime is 6561937. The reversal of 6561922 is 2291656.

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

It can be written as a sum of positive squares in only one way, i.e., 5803281 + 758641 = 2409^2 + 871^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1640479 + ... + 1640482.

Almost surely, 2^6561922 is an apocalyptic number.

6561922 is a deficient number, since it is larger than the sum of its proper divisors (3280964).

6561922 is a wasteful number, since it uses less digits than its factorization.

6561922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3280963.

The product of its digits is 6480, while the sum is 31.

The square root of 6561922 is about 2561.6248749573. The cubic root of 6561922 is about 187.2163129245.

The spelling of 6561922 in words is "six million, five hundred sixty-one thousand, nine hundred twenty-two".