12578987 has 2 divisors, whose sum is σ = 12578988. Its totient is φ = 12578986.

The previous prime is 12578983. The next prime is 12579023. The reversal of 12578987 is 78987521.

It is a weak prime.

It is an emirp because it is prime and its reverse (78987521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12578987 - 2² = 12578983 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12578983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6289493 + 6289494.

It is an arithmetic number, because the mean of its divisors is an integer number (6289494).

Almost surely, 2^12578987 is an apocalyptic number.

12578987 is a deficient number, since it is larger than the sum of its proper divisors (1).

12578987 is an equidigital number, since it uses as much as digits as its factorization.

12578987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 47.

The square root of 12578987 is about 3546.6867637275. The cubic root of 12578987 is about 232.5672492097.

The spelling of 12578987 in words is "twelve million, five hundred seventy-eight thousand, nine hundred eighty-seven".