12147738 has 16 divisors (see below), whose sum is σ = 24446496. Its totient is φ = 4024080.

The previous prime is 12147727. The next prime is 12147739. The reversal of 12147738 is 83774121.

It is a happy number.

12147738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12147699 and 12147708.

It is not an unprimeable number, because it can be changed into a prime (12147739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5233 + ... + 7188.

It is an arithmetic number, because the mean of its divisors is an integer number (1527906).

Almost surely, 2^12147738 is an apocalyptic number.

12147738 is an abundant number, since it is smaller than the sum of its proper divisors (12298758).

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

12147738 is a wasteful number, since it uses less digits than its factorization.

12147738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12589.

The product of its digits is 9408, while the sum is 33.

The square root of 12147738 is about 3485.3605265453. The cubic root of 12147738 is about 229.8785622323.

The spelling of 12147738 in words is "twelve million, one hundred forty-seven thousand, seven hundred thirty-eight".