12870005 has 8 divisors (see below), whose sum is σ = 15530424. Its totient is φ = 10238400.

The previous prime is 12870001. The next prime is 12870007. The reversal of 12870005 is 50007821.

It can be written as a sum of positive squares in 4 ways, for example, as 75076 + 12794929 = 274^2 + 3577^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12870005 - 2² = 12870001 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 (12870001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6206 + ... + 8015.

It is an arithmetic number, because the mean of its divisors is an integer number (1941303).

Almost surely, 2^12870005 is an apocalyptic number.

It is an amenable number.

12870005 is a deficient number, since it is larger than the sum of its proper divisors (2660419).

12870005 is a wasteful number, since it uses less digits than its factorization.

12870005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14407.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 12870005 is about 3587.4789197987. The cubic root of 12870005 is about 234.3470936848.

Adding to 12870005 its reverse (50007821), we get a palindrome (62877826).

The spelling of 12870005 in words is "twelve million, eight hundred seventy thousand, five".