12870157 has 2 divisors, whose sum is σ = 12870158. Its totient is φ = 12870156.

The previous prime is 12870107. The next prime is 12870161. The reversal of 12870157 is 75107821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8328996 + 4541161 = 2886^2 + 2131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12870157 is a prime.

It is the 3588-th Hogben number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12870107) by changing a digit.

It is a nontrivial repunit in base 3587.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6435078 + 6435079.

It is an arithmetic number, because the mean of its divisors is an integer number (6435079).

Almost surely, 2^12870157 is an apocalyptic number.

It is an amenable number.

12870157 is a deficient number, since it is larger than the sum of its proper divisors (1).

12870157 is an equidigital number, since it uses as much as digits as its factorization.

12870157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 12870157 is about 3587.5001045296. The cubic root of 12870157 is about 234.3480162594.

Adding to 12870157 its reverse (75107821), we get a palindrome (87977978).

The spelling of 12870157 in words is "twelve million, eight hundred seventy thousand, one hundred fifty-seven".