12146887 has 4 divisors (see below), whose sum is σ = 12153960. Its totient is φ = 12139816.

The previous prime is 12146881. The next prime is 12146903. The reversal of 12146887 is 78864121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 78864121 = 7 ⋅11266303.

It is a cyclic number.

It is not a de Polignac number, because 12146887 - 2⁷ = 12146759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12146881) 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, 873 + ... + 5005.

It is an arithmetic number, because the mean of its divisors is an integer number (3038490).

Almost surely, 2^12146887 is an apocalyptic number.

12146887 is a deficient number, since it is larger than the sum of its proper divisors (7073).

12146887 is an equidigital number, since it uses as much as digits as its factorization.

12146887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7072.

The product of its digits is 21504, while the sum is 37.

The square root of 12146887 is about 3485.2384423451. The cubic root of 12146887 is about 229.8731941211.

The spelling of 12146887 in words is "twelve million, one hundred forty-six thousand, eight hundred eighty-seven".