12506881 has 2 divisors, whose sum is σ = 12506882. Its totient is φ = 12506880.

The previous prime is 12506869. The next prime is 12506929. The reversal of 12506881 is 18860521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7376656 + 5130225 = 2716^2 + 2265^2 .

It is a cyclic number.

It is not a de Polignac number, because 12506881 - 2¹⁵ = 12474113 is a prime.

It is a super-2 number, since 2×12506881² = 312844144696322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12506821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6253440 + 6253441.

It is an arithmetic number, because the mean of its divisors is an integer number (6253441).

Almost surely, 2^12506881 is an apocalyptic number.

It is an amenable number.

12506881 is a deficient number, since it is larger than the sum of its proper divisors (1).

12506881 is an equidigital number, since it uses as much as digits as its factorization.

12506881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 12506881 is about 3536.5068924010. The cubic root of 12506881 is about 232.1220188993.

The spelling of 12506881 in words is "twelve million, five hundred six thousand, eight hundred eighty-one".