12509956 has 6 divisors (see below), whose sum is σ = 21892430. Its totient is φ = 6254976.

The previous prime is 12509951. The next prime is 12509963. The reversal of 12509956 is 65990521.

12509956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9734400 + 2775556 = 3120^2 + 1666^2 .

It is not an unprimeable number, because it can be changed into a prime (12509951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1563741 + ... + 1563748.

Almost surely, 2^12509956 is an apocalyptic number.

It is an amenable number.

12509956 is a deficient number, since it is larger than the sum of its proper divisors (9382474).

12509956 is a wasteful number, since it uses less digits than its factorization.

12509956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3127493 (or 3127491 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 12509956 is about 3536.9416167079. The cubic root of 12509956 is about 232.1410408739.

The spelling of 12509956 in words is "twelve million, five hundred nine thousand, nine hundred fifty-six".