12870161 has 2 divisors, whose sum is σ = 12870162. Its totient is φ = 12870160.

The previous prime is 12870157. The next prime is 12870167. The reversal of 12870161 is 16107821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6838225 + 6031936 = 2615^2 + 2456^2 .

It is a cyclic number.

It is not a de Polignac number, because 12870161 - 2² = 12870157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12870161.

It is not a weakly prime, because it can be changed into another prime (12870167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6435080 + 6435081.

It is an arithmetic number, because the mean of its divisors is an integer number (6435081).

Almost surely, 2^12870161 is an apocalyptic number.

It is an amenable number.

12870161 is a deficient number, since it is larger than the sum of its proper divisors (1).

12870161 is an equidigital number, since it uses as much as digits as its factorization.

12870161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 12870161 is about 3587.5006620208. The cubic root of 12870161 is about 234.3480405376.

Adding to 12870161 its reverse (16107821), we get a palindrome (28977982).

It can be divided in two parts, 12870 and 161, that added together give a palindrome (13031).

The spelling of 12870161 in words is "twelve million, eight hundred seventy thousand, one hundred sixty-one".