12155143 has 16 divisors (see below), whose sum is σ = 16321536. Its totient is φ = 8742240.

The previous prime is 12155137. The next prime is 12155159. The reversal of 12155143 is 34155121.

It is a happy number.

It is not a de Polignac number, because 12155143 - 2¹³ = 12146951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155123) 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 15 ways as a sum of consecutive naturals, for example, 5071 + ... + 7072.

It is an arithmetic number, because the mean of its divisors is an integer number (1020096).

Almost surely, 2^12155143 is an apocalyptic number.

12155143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12155143 is a deficient number, since it is larger than the sum of its proper divisors (4166393).

12155143 is a wasteful number, since it uses less digits than its factorization.

12155143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12174.

The product of its digits is 600, while the sum is 22.

The square root of 12155143 is about 3486.4226651397. The cubic root of 12155143 is about 229.9252624214.

Subtracting from 12155143 its sum of digits (22), we obtain a palindrome (12155121).

The spelling of 12155143 in words is "twelve million, one hundred fifty-five thousand, one hundred forty-three".