12870665 has 8 divisors (see below), whose sum is σ = 15464520. Its totient is φ = 10283392.

The previous prime is 12870661. The next prime is 12870691. The reversal of 12870665 is 56607821.

It can be written as a sum of positive squares in 4 ways, for example, as 395641 + 12475024 = 629^2 + 3532^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12870665 - 2² = 12870661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12870661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5447 + ... + 7443.

It is an arithmetic number, because the mean of its divisors is an integer number (1933065).

Almost surely, 2^12870665 is an apocalyptic number.

It is an amenable number.

12870665 is a deficient number, since it is larger than the sum of its proper divisors (2593855).

12870665 is a wasteful number, since it uses less digits than its factorization.

12870665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3291.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 12870665 is about 3587.5709052226. The cubic root of 12870665 is about 234.3510995480.

The spelling of 12870665 in words is "twelve million, eight hundred seventy thousand, six hundred sixty-five".