12031403 has 4 divisors (see below), whose sum is σ = 12043008. Its totient is φ = 12019800.

The previous prime is 12031387. The next prime is 12031417. The reversal of 12031403 is 30413021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30413021 = 41 ⋅741781.

It is a cyclic number.

It is not a de Polignac number, because 12031403 - 2⁴ = 12031387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12031493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4076 + ... + 6377.

It is an arithmetic number, because the mean of its divisors is an integer number (3010752).

Almost surely, 2^12031403 is an apocalyptic number.

12031403 is a deficient number, since it is larger than the sum of its proper divisors (11605).

12031403 is a wasteful number, since it uses less digits than its factorization.

12031403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11604.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 12031403 is about 3468.6312862569. The cubic root of 12031403 is about 229.1423826757.

Adding to 12031403 its reverse (30413021), we get a palindrome (42444424).

The spelling of 12031403 in words is "twelve million, thirty-one thousand, four hundred three".