12147872 has 24 divisors (see below), whose sum is σ = 26091072. Its totient is φ = 5521600.

The previous prime is 12147871. The next prime is 12147899. The reversal of 12147872 is 27874121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

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

It is not an unprimeable number, because it can be changed into a prime (12147871) 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 3 ways as a sum of consecutive naturals, for example, 16904 + ... + 17607.

It is an arithmetic number, because the mean of its divisors is an integer number (1087128).

Almost surely, 2^12147872 is an apocalyptic number.

It is an amenable number.

12147872 is an abundant number, since it is smaller than the sum of its proper divisors (13943200).

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

12147872 is a wasteful number, since it uses less digits than its factorization.

12147872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34532 (or 34524 counting only the distinct ones).

The product of its digits is 6272, while the sum is 32.

The square root of 12147872 is about 3485.3797497547. The cubic root of 12147872 is about 229.8794074820.

The spelling of 12147872 in words is "twelve million, one hundred forty-seven thousand, eight hundred seventy-two".