12603155 has 4 divisors (see below), whose sum is σ = 15123792. Its totient is φ = 10082520.

The previous prime is 12603133. The next prime is 12603161. The reversal of 12603155 is 55130621.

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

It is not a de Polignac number, because 12603155 - 2⁶ = 12603091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12603155.

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, 1260311 + ... + 1260320.

It is an arithmetic number, because the mean of its divisors is an integer number (3780948).

Almost surely, 2^12603155 is an apocalyptic number.

12603155 is a deficient number, since it is larger than the sum of its proper divisors (2520637).

12603155 is an equidigital number, since it uses as much as digits as its factorization.

12603155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520636.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 12603155 is about 3550.0922523225. The cubic root of 12603155 is about 232.7160976939.

Adding to 12603155 its reverse (55130621), we get a palindrome (67733776).

The spelling of 12603155 in words is "twelve million, six hundred three thousand, one hundred fifty-five".