11472821 has 4 divisors (see below), whose sum is σ = 11842944. Its totient is φ = 11102700.

The previous prime is 11472817. The next prime is 11472833. The reversal of 11472821 is 12827411.

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.

It is a cyclic number.

It is not a de Polignac number, because 11472821 - 2² = 11472817 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 (11472871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185015 + ... + 185076.

It is an arithmetic number, because the mean of its divisors is an integer number (2960736).

Almost surely, 2^11472821 is an apocalyptic number.

It is an amenable number.

11472821 is a deficient number, since it is larger than the sum of its proper divisors (370123).

11472821 is an equidigital number, since it uses as much as digits as its factorization.

11472821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370122.

The product of its digits is 896, while the sum is 26.

The square root of 11472821 is about 3387.1552961150. The cubic root of 11472821 is about 225.5399116184.

The spelling of 11472821 in words is "eleven million, four hundred seventy-two thousand, eight hundred twenty-one".