11998575 has 18 divisors (see below), whose sum is σ = 21491184. Its totient is φ = 6399120.

The previous prime is 11998541. The next prime is 11998577. The reversal of 11998575 is 57589911.

It is not a de Polignac number, because 11998575 - 2¹⁰ = 11997551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 11998575.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11998577) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 26439 + ... + 26888.

Almost surely, 2^11998575 is an apocalyptic number.

11998575 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11998575 is a deficient number, since it is larger than the sum of its proper divisors (9492609).

11998575 is a wasteful number, since it uses less digits than its factorization.

11998575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53343 (or 53335 counting only the distinct ones).

The product of its digits is 113400, while the sum is 45.

The square root of 11998575 is about 3463.8959279978. The cubic root of 11998575 is about 228.9337858308.

The spelling of 11998575 in words is "eleven million, nine hundred ninety-eight thousand, five hundred seventy-five".