12681603 has 40 divisors (see below), whose sum is σ = 21210816. Its totient is φ = 7484400.

The previous prime is 12681601. The next prime is 12681619. The reversal of 12681603 is 30618621.

12681603 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 12681603 - 2¹ = 12681601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (12681601) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 38148 + ... + 38478.

Almost surely, 2^12681603 is an apocalyptic number.

12681603 is a deficient number, since it is larger than the sum of its proper divisors (8529213).

12681603 is a wasteful number, since it uses less digits than its factorization.

12681603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397 (or 388 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 12681603 is about 3561.1238394642. The cubic root of 12681603 is about 233.1979443598.

The spelling of 12681603 in words is "twelve million, six hundred eighty-one thousand, six hundred three".