11828521 has 4 divisors (see below), whose sum is σ = 11877844. Its totient is φ = 11779200.

The previous prime is 11828519. The next prime is 11828527. The reversal of 11828521 is 12582811.

11828521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12582811 = 907 ⋅13873.

It can be written as a sum of positive squares in 2 ways, for example, as 7502121 + 4326400 = 2739^2 + 2080^2 .

It is a cyclic number.

It is not a de Polignac number, because 11828521 - 2¹ = 11828519 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 11828521.

It is not an unprimeable number, because it can be changed into a prime (11828527) 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 3 ways as a sum of consecutive naturals, for example, 24300 + ... + 24781.

It is an arithmetic number, because the mean of its divisors is an integer number (2969461).

Almost surely, 2^11828521 is an apocalyptic number.

It is an amenable number.

11828521 is a deficient number, since it is larger than the sum of its proper divisors (49323).

11828521 is an equidigital number, since it uses as much as digits as its factorization.

11828521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49322.

The product of its digits is 1280, while the sum is 28.

The square root of 11828521 is about 3439.2616940268. The cubic root of 11828521 is about 227.8470876305.

The spelling of 11828521 in words is "eleven million, eight hundred twenty-eight thousand, five hundred twenty-one".