11198521 has 4 divisors (see below), whose sum is σ = 11257344. Its totient is φ = 11139700.

The previous prime is 11198507. The next prime is 11198557. The reversal of 11198521 is 12589111.

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 a cyclic number.

It is not a de Polignac number, because 11198521 - 2¹³ = 11190329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11198521.

It is not an unprimeable number, because it can be changed into a prime (11198501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29125 + ... + 29506.

It is an arithmetic number, because the mean of its divisors is an integer number (2814336).

Almost surely, 2^11198521 is an apocalyptic number.

It is an amenable number.

11198521 is a deficient number, since it is larger than the sum of its proper divisors (58823).

11198521 is an equidigital number, since it uses as much as digits as its factorization.

11198521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58822.

The product of its digits is 720, while the sum is 28.

The square root of 11198521 is about 3346.4191309518. The cubic root of 11198521 is about 223.7279395247.

The spelling of 11198521 in words is "eleven million, one hundred ninety-eight thousand, five hundred twenty-one".