12271672 has 32 divisors (see below), whose sum is σ = 26409600. Its totient is φ = 5236704.

The previous prime is 12271643. The next prime is 12271681. The reversal of 12271672 is 27617221.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 12271672.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23203 + ... + 23725.

It is an arithmetic number, because the mean of its divisors is an integer number (825300).

Almost surely, 2^12271672 is an apocalyptic number.

It is an amenable number.

12271672 is an abundant number, since it is smaller than the sum of its proper divisors (14137928).

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

12271672 is a wasteful number, since it uses less digits than its factorization.

12271672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955 (or 951 counting only the distinct ones).

The product of its digits is 2352, while the sum is 28.

The square root of 12271672 is about 3503.0946318933. The cubic root of 12271672 is about 230.6576765219.

Adding to 12271672 its reverse (27617221), we get a palindrome (39888893).

The spelling of 12271672 in words is "twelve million, two hundred seventy-one thousand, six hundred seventy-two".