12103491 has 4 divisors (see below), whose sum is σ = 16137992. Its totient is φ = 8068992.

The previous prime is 12103459. The next prime is 12103493. The reversal of 12103491 is 19430121.

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

It is not a de Polignac number, because 12103491 - 2⁵ = 12103459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12103493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2017246 + ... + 2017251.

It is an arithmetic number, because the mean of its divisors is an integer number (4034498).

Almost surely, 2^12103491 is an apocalyptic number.

12103491 is a deficient number, since it is larger than the sum of its proper divisors (4034501).

12103491 is an equidigital number, since it uses as much as digits as its factorization.

12103491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4034500.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 12103491 is about 3479.0071859656. The cubic root of 12103491 is about 229.5991189512.

The spelling of 12103491 in words is "twelve million, one hundred three thousand, four hundred ninety-one".