12105403 has 6 divisors (see below), whose sum is σ = 12395364. Its totient is φ = 11822076.

The previous prime is 12105397. The next prime is 12105419. The reversal of 12105403 is 30450121.

It is a de Polignac number, because none of the positive numbers 2^k-12105403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12105433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1425 + ... + 5122.

It is an arithmetic number, because the mean of its divisors is an integer number (2065894).

Almost surely, 2^12105403 is an apocalyptic number.

12105403 is a deficient number, since it is larger than the sum of its proper divisors (289961).

12105403 is an frugal number, since it uses more digits than its factorization.

12105403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6633 (or 6590 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 12105403 is about 3479.2819661534. The cubic root of 12105403 is about 229.6112083118.

Adding to 12105403 its reverse (30450121), we get a palindrome (42555524).

The spelling of 12105403 in words is "twelve million, one hundred five thousand, four hundred three".