6561122 has 4 divisors (see below), whose sum is σ = 9841686. Its totient is φ = 3280560.

The previous prime is 6561103. The next prime is 6561127. The reversal of 6561122 is 2211656.

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., 6558721 + 2401 = 2561^2 + 49^2 .

It is not an unprimeable number, because it can be changed into a prime (6561127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1640279 + ... + 1640282.

Almost surely, 2^6561122 is an apocalyptic number.

6561122 is a deficient number, since it is larger than the sum of its proper divisors (3280564).

6561122 is a wasteful number, since it uses less digits than its factorization.

6561122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3280563.

The product of its digits is 720, while the sum is 23.

The square root of 6561122 is about 2561.4687193093. The cubic root of 6561122 is about 187.2087044252.

Adding to 6561122 its reverse (2211656), we get a palindrome (8772778).

The spelling of 6561122 in words is "six million, five hundred sixty-one thousand, one hundred twenty-two".