12486221 has 4 divisors (see below), whose sum is σ = 13621344. Its totient is φ = 11351100.

The previous prime is 12486209. The next prime is 12486239. The reversal of 12486221 is 12268421.

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.

It is a cyclic number.

It is not a de Polignac number, because 12486221 - 2⁶ = 12486157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12486251) 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, 567545 + ... + 567566.

It is an arithmetic number, because the mean of its divisors is an integer number (3405336).

Almost surely, 2^12486221 is an apocalyptic number.

12486221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12486221 is a deficient number, since it is larger than the sum of its proper divisors (1135123).

12486221 is a wasteful number, since it uses less digits than its factorization.

12486221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135122.

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

The square root of 12486221 is about 3533.5847237614. The cubic root of 12486221 is about 231.9941350578.

The spelling of 12486221 in words is "twelve million, four hundred eighty-six thousand, two hundred twenty-one".