12147145 has 8 divisors (see below), whose sum is σ = 14636160. Its totient is φ = 9678000.

The previous prime is 12147139. The next prime is 12147173. The reversal of 12147145 is 54174121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12147145 - 2¹³ = 12138953 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3585 + ... + 6094.

It is an arithmetic number, because the mean of its divisors is an integer number (1829520).

Almost surely, 2^12147145 is an apocalyptic number.

It is an amenable number.

12147145 is a deficient number, since it is larger than the sum of its proper divisors (2489015).

12147145 is an equidigital number, since it uses as much as digits as its factorization.

12147145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9935.

The product of its digits is 1120, while the sum is 25.

The square root of 12147145 is about 3485.2754553980. The cubic root of 12147145 is about 229.8748216126.

The spelling of 12147145 in words is "twelve million, one hundred forty-seven thousand, one hundred forty-five".