12603855 has 16 divisors (see below), whose sum is σ = 21999744. Its totient is φ = 6110880.

The previous prime is 12603853. The next prime is 12603869. The reversal of 12603855 is 55830621.

It is not a de Polignac number, because 12603855 - 2¹ = 12603853 is a prime.

It is a super-2 number, since 2×12603855² = 317714321722050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12603853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38029 + ... + 38358.

It is an arithmetic number, because the mean of its divisors is an integer number (1374984).

Almost surely, 2^12603855 is an apocalyptic number.

12603855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12603855 is a deficient number, since it is larger than the sum of its proper divisors (9395889).

12603855 is a wasteful number, since it uses less digits than its factorization.

12603855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76406.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 12603855 is about 3550.1908399409. The cubic root of 12603855 is about 232.7204060927.

It can be divided in two parts, 1260 and 3855, that added together give a palindrome (5115).

The spelling of 12603855 in words is "twelve million, six hundred three thousand, eight hundred fifty-five".