12603145 has 4 divisors (see below), whose sum is σ = 15123780. Its totient is φ = 10082512.

The previous prime is 12603133. The next prime is 12603161. The reversal of 12603145 is 54130621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4239481 + 8363664 = 2059^2 + 2892^2 .

It is a cyclic number.

It is not a de Polignac number, because 12603145 - 2¹⁵ = 12570377 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1260310 + ... + 1260319.

It is an arithmetic number, because the mean of its divisors is an integer number (3780945).

Almost surely, 2^12603145 is an apocalyptic number.

It is an amenable number.

12603145 is a deficient number, since it is larger than the sum of its proper divisors (2520635).

12603145 is an equidigital number, since it uses as much as digits as its factorization.

12603145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2520634.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 12603145 is about 3550.0908439081. The cubic root of 12603145 is about 232.7160361442.

Adding to 12603145 its reverse (54130621), we get a palindrome (66733766).

The spelling of 12603145 in words is "twelve million, six hundred three thousand, one hundred forty-five".