12248821 has 4 divisors (see below), whose sum is σ = 13191052. Its totient is φ = 11306592.

The previous prime is 12248809. The next prime is 12248827. The reversal of 12248821 is 12884221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12884221 = 7 ⋅1840603.

It can be written as a sum of positive squares in 2 ways, for example, as 5948721 + 6300100 = 2439^2 + 2510^2 .

It is a cyclic number.

It is not a de Polignac number, because 12248821 - 2¹⁹ = 11724533 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 12248821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12248827) 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, 471096 + ... + 471121.

It is an arithmetic number, because the mean of its divisors is an integer number (3297763).

Almost surely, 2^12248821 is an apocalyptic number.

It is an amenable number.

12248821 is a deficient number, since it is larger than the sum of its proper divisors (942231).

12248821 is an equidigital number, since it uses as much as digits as its factorization.

12248821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942230.

The product of its digits is 2048, while the sum is 28.

The square root of 12248821 is about 3499.8315673758. The cubic root of 12248821 is about 230.5144188495.

The spelling of 12248821 in words is "twelve million, two hundred forty-eight thousand, eight hundred twenty-one".