12142987 has 4 divisors (see below), whose sum is σ = 12150016. Its totient is φ = 12135960.

The previous prime is 12142969. The next prime is 12142997. The reversal of 12142987 is 78924121.

12142987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 78924121 = 5323 ⋅14827.

It is a cyclic number.

It is not a de Polignac number, because 12142987 - 2¹¹ = 12140939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12142937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1078 + ... + 5044.

It is an arithmetic number, because the mean of its divisors is an integer number (3037504).

Almost surely, 2^12142987 is an apocalyptic number.

12142987 is a deficient number, since it is larger than the sum of its proper divisors (7029).

12142987 is an equidigital number, since it uses as much as digits as its factorization.

12142987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7028.

The product of its digits is 8064, while the sum is 34.

The square root of 12142987 is about 3484.6788948194. The cubic root of 12142987 is about 229.8485896986.

The spelling of 12142987 in words is "twelve million, one hundred forty-two thousand, nine hundred eighty-seven".