12147851 has 4 divisors (see below), whose sum is σ = 12169992. Its totient is φ = 12125712.

The previous prime is 12147847. The next prime is 12147853. The reversal of 12147851 is 15874121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15874121 = 953 ⋅16657.

It is a cyclic number.

It is not a de Polignac number, because 12147851 - 2² = 12147847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12147853) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10226 + ... + 11351.

It is an arithmetic number, because the mean of its divisors is an integer number (3042498).

Almost surely, 2^12147851 is an apocalyptic number.

12147851 is a deficient number, since it is larger than the sum of its proper divisors (22141).

12147851 is an equidigital number, since it uses as much as digits as its factorization.

12147851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22140.

The product of its digits is 2240, while the sum is 29.

The square root of 12147851 is about 3485.3767371692. The cubic root of 12147851 is about 229.8792750179.

The spelling of 12147851 in words is "twelve million, one hundred forty-seven thousand, eight hundred fifty-one".