11409975 has 72 divisors (see below), whose sum is σ = 22922640. Its totient is φ = 5391360.

The previous prime is 11409971. The next prime is 11409977. The reversal of 11409975 is 57990411.

It is not a de Polignac number, because 11409975 - 2² = 11409971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11409971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 72597 + ... + 72753.

It is an arithmetic number, because the mean of its divisors is an integer number (318370).

Almost surely, 2^11409975 is an apocalyptic number.

11409975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11409975 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

11409975 is a wasteful number, since it uses less digits than its factorization.

11409975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 11409975 is about 3377.8654502511. The cubic root of 11409975 is about 225.1273353303.

The spelling of 11409975 in words is "eleven million, four hundred nine thousand, nine hundred seventy-five".