12087139 has 2 divisors, whose sum is σ = 12087140. Its totient is φ = 12087138.

The previous prime is 12087137. The next prime is 12087151. The reversal of 12087139 is 93178021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12087139 - 2¹ = 12087137 is a prime.

Together with 12087137, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12087139.

It is not a weakly prime, because it can be changed into another prime (12087137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6043569 + 6043570.

It is an arithmetic number, because the mean of its divisors is an integer number (6043570).

Almost surely, 2^12087139 is an apocalyptic number.

12087139 is a deficient number, since it is larger than the sum of its proper divisors (1).

12087139 is an equidigital number, since it uses as much as digits as its factorization.

12087139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 12087139 is about 3476.6562959257. The cubic root of 12087139 is about 229.4956750545.

The spelling of 12087139 in words is "twelve million, eighty-seven thousand, one hundred thirty-nine".