11872143 has 8 divisors (see below), whose sum is σ = 17588400. Its totient is φ = 7914744.

The previous prime is 11872111. The next prime is 11872177. The reversal of 11872143 is 34127811.

It is not a de Polignac number, because 11872143 - 2⁵ = 11872111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 439709 = 11872143 / (1 + 1 + 8 + 7 + 2 + 1 + 4 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11872243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219828 + ... + 219881.

It is an arithmetic number, because the mean of its divisors is an integer number (2198550).

Almost surely, 2^11872143 is an apocalyptic number.

11872143 is a deficient number, since it is larger than the sum of its proper divisors (5716257).

11872143 is an equidigital number, since it uses as much as digits as its factorization.

11872143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439718 (or 439712 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 11872143 is about 3445.5976259569. The cubic root of 11872143 is about 228.1268338628.

Adding to 11872143 its reverse (34127811), we get a palindrome (45999954).

The spelling of 11872143 in words is "eleven million, eight hundred seventy-two thousand, one hundred forty-three".