12305272 has 24 divisors (see below), whose sum is σ = 26840160. Its totient is φ = 5273520.

The previous prime is 12305261. The next prime is 12305273. The reversal of 12305272 is 27250321.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12305273) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15304 + ... + 16087.

It is an arithmetic number, because the mean of its divisors is an integer number (1118340).

Almost surely, 2^12305272 is an apocalyptic number.

It is an amenable number.

12305272 is an abundant number, since it is smaller than the sum of its proper divisors (14534888).

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

12305272 is a wasteful number, since it uses less digits than its factorization.

12305272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31411 (or 31400 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 12305272 is about 3507.8871133490. The cubic root of 12305272 is about 230.8679992712.

Adding to 12305272 its reverse (27250321), we get a palindrome (39555593).

The spelling of 12305272 in words is "twelve million, three hundred five thousand, two hundred seventy-two".