12215436 has 12 divisors (see below), whose sum is σ = 28502712. Its totient is φ = 4071808.

The previous prime is 12215429. The next prime is 12215449. The reversal of 12215436 is 63451221.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508965 + ... + 508988.

It is an arithmetic number, because the mean of its divisors is an integer number (2375226).

Almost surely, 2^12215436 is an apocalyptic number.

It is an amenable number.

12215436 is an abundant number, since it is smaller than the sum of its proper divisors (16287276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12215436 is a wasteful number, since it uses less digits than its factorization.

12215436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017960 (or 1017958 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 12215436 is about 3495.0587977887. The cubic root of 12215436 is about 230.3048006824.

Adding to 12215436 its reverse (63451221), we get a palindrome (75666657).

The spelling of 12215436 in words is "twelve million, two hundred fifteen thousand, four hundred thirty-six".