12911650 has 12 divisors (see below), whose sum is σ = 24015762. Its totient is φ = 5164640.

The previous prime is 12911623. The next prime is 12911651. The reversal of 12911650 is 5611921.

It can be written as a sum of positive squares in 3 ways, for example, as 12552849 + 358801 = 3543^2 + 599^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (12911651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 129067 + ... + 129166.

Almost surely, 2^12911650 is an apocalyptic number.

12911650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12911650 is a deficient number, since it is larger than the sum of its proper divisors (11104112).

12911650 is a wasteful number, since it uses less digits than its factorization.

12911650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258245 (or 258240 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 12911650 is about 3593.2784473236. The cubic root of 12911650 is about 234.5995897552.

The spelling of 12911650 in words is "twelve million, nine hundred eleven thousand, six hundred fifty".