11822521 has 4 divisors (see below), whose sum is σ = 12074112. Its totient is φ = 11570932.

The previous prime is 11822519. The next prime is 11822527. The reversal of 11822521 is 12522811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12522811 = 7 ⋅1788973.

It is a cyclic number.

It is not a de Polignac number, because 11822521 - 2¹ = 11822519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11822492 and 11822501.

It is not an unprimeable number, because it can be changed into a prime (11822527) 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, 125725 + ... + 125818.

It is an arithmetic number, because the mean of its divisors is an integer number (3018528).

Almost surely, 2^11822521 is an apocalyptic number.

It is an amenable number.

11822521 is a deficient number, since it is larger than the sum of its proper divisors (251591).

11822521 is an equidigital number, since it uses as much as digits as its factorization.

11822521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251590.

The product of its digits is 320, while the sum is 22.

The square root of 11822521 is about 3438.3893031476. The cubic root of 11822521 is about 227.8085560806.

The spelling of 11822521 in words is "eleven million, eight hundred twenty-two thousand, five hundred twenty-one".