11521375 has 16 divisors (see below), whose sum is σ = 14624064. Its totient is φ = 9060000.

The previous prime is 11521361. The next prime is 11521379. The reversal of 11521375 is 57312511.

It is not a de Polignac number, because 11521375 - 2⁹ = 11520863 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11521379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6870 + ... + 8380.

It is an arithmetic number, because the mean of its divisors is an integer number (914004).

Almost surely, 2^11521375 is an apocalyptic number.

11521375 is a deficient number, since it is larger than the sum of its proper divisors (3102689).

11521375 is an equidigital number, since it uses as much as digits as its factorization.

11521375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587 (or 1577 counting only the distinct ones).

The product of its digits is 1050, while the sum is 25.

The square root of 11521375 is about 3394.3151002816. The cubic root of 11521375 is about 225.8576321611.

Adding to 11521375 its reverse (57312511), we get a palindrome (68833886).

The spelling of 11521375 in words is "eleven million, five hundred twenty-one thousand, three hundred seventy-five".