11515975 has 12 divisors (see below), whose sum is σ = 14322744. Its totient is φ = 9185120.

The previous prime is 11515961. The next prime is 11515997. The reversal of 11515975 is 57951511.

It is a happy number.

11515975 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11515975 - 2¹⁷ = 11384903 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 11515975.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13512 + ... + 14338.

It is an arithmetic number, because the mean of its divisors is an integer number (1193562).

Almost surely, 2^11515975 is an apocalyptic number.

11515975 is a deficient number, since it is larger than the sum of its proper divisors (2806769).

11515975 is an equidigital number, since it uses as much as digits as its factorization.

11515975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394 (or 1389 counting only the distinct ones).

The product of its digits is 7875, while the sum is 34.

The square root of 11515975 is about 3393.5195593955. The cubic root of 11515975 is about 225.8223406035.

The spelling of 11515975 in words is "eleven million, five hundred fifteen thousand, nine hundred seventy-five".