12603561 has 8 divisors (see below), whose sum is σ = 16959360. Its totient is φ = 8325072.

The previous prime is 12603551. The next prime is 12603583. The reversal of 12603561 is 16530621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12603561 - 2⁵ = 12603529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12603551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18945 + ... + 19598.

It is an arithmetic number, because the mean of its divisors is an integer number (2119920).

Almost surely, 2^12603561 is an apocalyptic number.

It is an amenable number.

12603561 is a deficient number, since it is larger than the sum of its proper divisors (4355799).

12603561 is a wasteful number, since it uses less digits than its factorization.

12603561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38655.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 12603561 is about 3550.1494334746. The cubic root of 12603561 is about 232.7185965847.

The spelling of 12603561 in words is "twelve million, six hundred three thousand, five hundred sixty-one".