11198561 has 8 divisors (see below), whose sum is σ = 12241344. Its totient is φ = 10159920.

The previous prime is 11198557. The next prime is 11198567. The reversal of 11198561 is 16589111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11198561 - 2² = 11198557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11198567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8435 + ... + 9671.

It is an arithmetic number, because the mean of its divisors is an integer number (1530168).

Almost surely, 2^11198561 is an apocalyptic number.

11198561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11198561 is a deficient number, since it is larger than the sum of its proper divisors (1042783).

11198561 is a wasteful number, since it uses less digits than its factorization.

11198561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2071.

The product of its digits is 2160, while the sum is 32.

The square root of 11198561 is about 3346.4251074841. The cubic root of 11198561 is about 223.7282059024.

It can be divided in two parts, 1119 and 8561, that multiplied together give a palindrome (9579759).

The spelling of 11198561 in words is "eleven million, one hundred ninety-eight thousand, five hundred sixty-one".