12506939 has 4 divisors (see below), whose sum is σ = 12570624. Its totient is φ = 12443256.

The previous prime is 12506933. The next prime is 12506941. The reversal of 12506939 is 93960521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93960521 = 227 ⋅413923.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12506939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12506899 and 12506908.

It is not an unprimeable number, because it can be changed into a prime (12506933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31547 + ... + 31940.

It is an arithmetic number, because the mean of its divisors is an integer number (3142656).

Almost surely, 2^12506939 is an apocalyptic number.

12506939 is a deficient number, since it is larger than the sum of its proper divisors (63685).

12506939 is an equidigital number, since it uses as much as digits as its factorization.

12506939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63684.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 12506939 is about 3536.5150925735. The cubic root of 12506939 is about 232.1223777166.

The spelling of 12506939 in words is "twelve million, five hundred six thousand, nine hundred thirty-nine".