12671220 has 24 divisors (see below), whose sum is σ = 35479584. Its totient is φ = 3378976.

The previous prime is 12671201. The next prime is 12671221. The reversal of 12671220 is 2217621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12671221) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 105534 + ... + 105653.

It is an arithmetic number, because the mean of its divisors is an integer number (1478316).

Almost surely, 2^12671220 is an apocalyptic number.

12671220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12671220 is an abundant number, since it is smaller than the sum of its proper divisors (22808364).

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

12671220 is a wasteful number, since it uses less digits than its factorization.

12671220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211199 (or 211197 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 12671220 is about 3559.6657146423. The cubic root of 12671220 is about 233.1342837599.

Adding to 12671220 its reverse (2217621), we get a palindrome (14888841).

The spelling of 12671220 in words is "twelve million, six hundred seventy-one thousand, two hundred twenty".