6561098 has 4 divisors (see below), whose sum is σ = 9841650. Its totient is φ = 3280548.

The previous prime is 6561097. The next prime is 6561103. The reversal of 6561098 is 8901656.

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., 6466849 + 94249 = 2543^2 + 307^2 .

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (6561091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1640273 + ... + 1640276.

Almost surely, 2^6561098 is an apocalyptic number.

6561098 is a deficient number, since it is larger than the sum of its proper divisors (3280552).

6561098 is a wasteful number, since it uses less digits than its factorization.

6561098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3280551.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 6561098 is about 2561.4640344928. The cubic root of 6561098 is about 187.2084761606.

The spelling of 6561098 in words is "six million, five hundred sixty-one thousand, ninety-eight".