11525515 has 4 divisors (see below), whose sum is σ = 13830624. Its totient is φ = 9220408.

The previous prime is 11525509. The next prime is 11525543. The reversal of 11525515 is 51552511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11525515 - 2¹⁷ = 11394443 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 11525515.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1152547 + ... + 1152556.

It is an arithmetic number, because the mean of its divisors is an integer number (3457656).

Almost surely, 2^11525515 is an apocalyptic number.

11525515 is a deficient number, since it is larger than the sum of its proper divisors (2305109).

11525515 is an equidigital number, since it uses as much as digits as its factorization.

11525515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2305108.

The product of its digits is 1250, while the sum is 25.

The square root of 11525515 is about 3394.9248887126. The cubic root of 11525515 is about 225.8846815547.

The spelling of 11525515 in words is "eleven million, five hundred twenty-five thousand, five hundred fifteen".