12940636 has 6 divisors (see below), whose sum is σ = 22646120. Its totient is φ = 6470316.

The previous prime is 12940619. The next prime is 12940643. The reversal of 12940636 is 63604921.

It is a junction number, because it is equal to n+sod(n) for n = 12940598 and 12940607.

It is a congruent number.

It is an unprimeable number.

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, 1617576 + ... + 1617583.

Almost surely, 2^12940636 is an apocalyptic number.

It is an amenable number.

12940636 is a deficient number, since it is larger than the sum of its proper divisors (9705484).

12940636 is a wasteful number, since it uses less digits than its factorization.

12940636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3235163 (or 3235161 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 12940636 is about 3597.3095502055. The cubic root of 12940636 is about 234.7750132789.

The spelling of 12940636 in words is "twelve million, nine hundred forty thousand, six hundred thirty-six".