12143903 has 4 divisors (see below), whose sum is σ = 12169128. Its totient is φ = 12118680.

The previous prime is 12143891. The next prime is 12143927. The reversal of 12143903 is 30934121.

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

It is a cyclic number.

It is not a de Polignac number, because 12143903 - 2¹² = 12139807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12143993) 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, 11876 + ... + 12857.

It is an arithmetic number, because the mean of its divisors is an integer number (3042282).

Almost surely, 2^12143903 is an apocalyptic number.

12143903 is a deficient number, since it is larger than the sum of its proper divisors (25225).

12143903 is an equidigital number, since it uses as much as digits as its factorization.

12143903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25224.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 12143903 is about 3484.8103248240. The cubic root of 12143903 is about 229.8543690568.

The spelling of 12143903 in words is "twelve million, one hundred forty-three thousand, nine hundred three".