11521825 has 12 divisors (see below), whose sum is σ = 16328320. Its totient is φ = 7900560.

The previous prime is 11521823. The next prime is 11521859. The reversal of 11521825 is 52812511.

It is not a de Polignac number, because 11521825 - 2¹ = 11521823 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 11521825.

It is not an unprimeable number, because it can be changed into a prime (11521823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32745 + ... + 33094.

Almost surely, 2^11521825 is an apocalyptic number.

It is an amenable number.

11521825 is a deficient number, since it is larger than the sum of its proper divisors (4806495).

11521825 is an equidigital number, since it uses as much as digits as its factorization.

11521825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65856 (or 65851 counting only the distinct ones).

The product of its digits is 800, while the sum is 25.

The square root of 11521825 is about 3394.3813869393. The cubic root of 11521825 is about 225.8605726264.

The spelling of 11521825 in words is "eleven million, five hundred twenty-one thousand, eight hundred twenty-five".