9198561 has 4 divisors (see below), whose sum is σ = 12264752. Its totient is φ = 6132372.

The previous prime is 9198559. The next prime is 9198569. The reversal of 9198561 is 1658919.

9198561 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9198561 - 2¹ = 9198559 is a prime.

It is a super-2 number, since 2×9198561² = 169227048941442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9198569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1533091 + ... + 1533096.

It is an arithmetic number, because the mean of its divisors is an integer number (3066188).

Almost surely, 2^9198561 is an apocalyptic number.

It is an amenable number.

9198561 is a deficient number, since it is larger than the sum of its proper divisors (3066191).

9198561 is a wasteful number, since it uses less digits than its factorization.

9198561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3066190.

The product of its digits is 19440, while the sum is 39.

The square root of 9198561 is about 3032.9129562188. The cubic root of 9198561 is about 209.5269852439.

It can be divided in two parts, 9198 and 561, that multiplied together give a triangular number (5160078 = T₃₂₁₂).

The spelling of 9198561 in words is "nine million, one hundred ninety-eight thousand, five hundred sixty-one".