11552821 has 8 divisors (see below), whose sum is σ = 13262720. Its totient is φ = 9857808.

The previous prime is 11552819. The next prime is 11552833. The reversal of 11552821 is 12825511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11552821 - 2¹ = 11552819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11592821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2001 + ... + 5206.

It is an arithmetic number, because the mean of its divisors is an integer number (1657840).

Almost surely, 2^11552821 is an apocalyptic number.

It is an amenable number.

11552821 is a deficient number, since it is larger than the sum of its proper divisors (1709899).

11552821 is an equidigital number, since it uses as much as digits as its factorization.

11552821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7443.

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

The square root of 11552821 is about 3398.9441007466. The cubic root of 11552821 is about 226.0629278913.

The spelling of 11552821 in words is "eleven million, five hundred fifty-two thousand, eight hundred twenty-one".