12147534 has 48 divisors (see below), whose sum is σ = 30282720. Its totient is φ = 3447360.

The previous prime is 12147533. The next prime is 12147539. The reversal of 12147534 is 43574121.

12147534 is a `hidden beast` number, since 121 + 4 + 7 + 534 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 12147498 and 12147507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12147533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28644 + ... + 29064.

It is an arithmetic number, because the mean of its divisors is an integer number (630890).

Almost surely, 2^12147534 is an apocalyptic number.

12147534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12147534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15141360).

12147534 is an abundant number, since it is smaller than the sum of its proper divisors (18135186).

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

12147534 is a wasteful number, since it uses less digits than its factorization.

12147534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665 (or 662 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 12147534 is about 3485.3312611573. The cubic root of 12147534 is about 229.8772754224.

The spelling of 12147534 in words is "twelve million, one hundred forty-seven thousand, five hundred thirty-four".