12359681 has 2 divisors, whose sum is σ = 12359682. Its totient is φ = 12359680.

The previous prime is 12359657. The next prime is 12359687. The reversal of 12359681 is 18695321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10784656 + 1575025 = 3284^2 + 1255^2 .

It is an emirp because it is prime and its reverse (18695321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12359681 - 2⁶ = 12359617 is a prime.

It is a super-2 number, since 2×12359681² = 305523428843522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12359687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6179840 + 6179841.

It is an arithmetic number, because the mean of its divisors is an integer number (6179841).

Almost surely, 2^12359681 is an apocalyptic number.

It is an amenable number.

12359681 is a deficient number, since it is larger than the sum of its proper divisors (1).

12359681 is an equidigital number, since it uses as much as digits as its factorization.

12359681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 35.

The square root of 12359681 is about 3515.6337977668. The cubic root of 12359681 is about 231.2077676956.

The spelling of 12359681 in words is "twelve million, three hundred fifty-nine thousand, six hundred eighty-one".