12224861 has 4 divisors (see below), whose sum is σ = 13336224. Its totient is φ = 11113500.

The previous prime is 12224843. The next prime is 12224873. The reversal of 12224861 is 16842221.

It is a happy number.

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: 16842221 = 11 ⋅1531111.

It is a cyclic number.

It is not a de Polignac number, because 12224861 - 2²² = 8030557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12224861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12224831) 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, 555665 + ... + 555686.

It is an arithmetic number, because the mean of its divisors is an integer number (3334056).

Almost surely, 2^12224861 is an apocalyptic number.

12224861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12224861 is a deficient number, since it is larger than the sum of its proper divisors (1111363).

12224861 is a wasteful number, since it uses less digits than its factorization.

12224861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111362.

The product of its digits is 1536, while the sum is 26.

The square root of 12224861 is about 3496.4068699166. The cubic root of 12224861 is about 230.3640171450.

The spelling of 12224861 in words is "twelve million, two hundred twenty-four thousand, eight hundred sixty-one".