12147040 has 72 divisors (see below), whose sum is σ = 30028320. Its totient is φ = 4642560.

The previous prime is 12147011. The next prime is 12147043. The reversal of 12147040 is 4074121.

It is a junction number, because it is equal to n+sod(n) for n = 12146999 and 12147017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12147043) 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 11 ways as a sum of consecutive naturals, for example, 153721 + ... + 153799.

It is an arithmetic number, because the mean of its divisors is an integer number (417060).

Almost surely, 2^12147040 is an apocalyptic number.

12147040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12147040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15014160).

12147040 is an abundant number, since it is smaller than the sum of its proper divisors (17881280).

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

12147040 is an equidigital number, since it uses as much as digits as its factorization.

12147040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 12147040 is about 3485.2603919937. The cubic root of 12147040 is about 229.8741592642.

The spelling of 12147040 in words is "twelve million, one hundred forty-seven thousand, forty".