12098561 has 2 divisors, whose sum is σ = 12098562. Its totient is φ = 12098560.

The previous prime is 12098549. The next prime is 12098617. The reversal of 12098561 is 16589021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10523536 + 1575025 = 3244^2 + 1255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12098561 is a prime.

It is a Chen prime.

It is equal to p₇₉₄₀₆₆ and since 12098561 and 794066 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (12098501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6049280 + 6049281.

It is an arithmetic number, because the mean of its divisors is an integer number (6049281).

Almost surely, 2^12098561 is an apocalyptic number.

It is an amenable number.

12098561 is a deficient number, since it is larger than the sum of its proper divisors (1).

12098561 is an equidigital number, since it uses as much as digits as its factorization.

12098561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 12098561 is about 3478.2985783282. The cubic root of 12098561 is about 229.5679412417.

The spelling of 12098561 in words is "twelve million, ninety-eight thousand, five hundred sixty-one".