11412821 has 4 divisors (see below), whose sum is σ = 13043232. Its totient is φ = 9782412.

The previous prime is 11412811. The next prime is 11412829. The reversal of 11412821 is 12821411.

11412821 is digitally balanced in base 2, 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 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 11412821 - 2¹⁰ = 11411797 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11412793 and 11412802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11412829) 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, 815195 + ... + 815208.

It is an arithmetic number, because the mean of its divisors is an integer number (3260808).

Almost surely, 2^11412821 is an apocalyptic number.

It is an amenable number.

11412821 is a deficient number, since it is larger than the sum of its proper divisors (1630411).

11412821 is an equidigital number, since it uses as much as digits as its factorization.

11412821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630410.

The product of its digits is 128, while the sum is 20.

The square root of 11412821 is about 3378.2866959452. The cubic root of 11412821 is about 225.1460516767.

The spelling of 11412821 in words is "eleven million, four hundred twelve thousand, eight hundred twenty-one".