12587878 has 4 divisors (see below), whose sum is σ = 18881820. Its totient is φ = 6293938.

The previous prime is 12587873. The next prime is 12587879. The reversal of 12587878 is 87878521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12587873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3146968 + ... + 3146971.

It is an arithmetic number, because the mean of its divisors is an integer number (4720455).

Almost surely, 2^12587878 is an apocalyptic number.

12587878 is a deficient number, since it is larger than the sum of its proper divisors (6293942).

12587878 is an equidigital number, since it uses as much as digits as its factorization.

12587878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6293941.

The product of its digits is 250880, while the sum is 46.

The square root of 12587878 is about 3547.9399656702. The cubic root of 12587878 is about 232.6220302090.

The spelling of 12587878 in words is "twelve million, five hundred eighty-seven thousand, eight hundred seventy-eight".