12143261 has 16 divisors (see below), whose sum is σ = 13890240. Its totient is φ = 10523520.

The previous prime is 12143251. The next prime is 12143291. The reversal of 12143261 is 16234121.

It is a cyclic number.

It is not a de Polignac number, because 12143261 - 2¹⁰ = 12142237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12143221) 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, 52001 + ... + 52233.

It is an arithmetic number, because the mean of its divisors is an integer number (868140).

Almost surely, 2^12143261 is an apocalyptic number.

It is an amenable number.

12143261 is a deficient number, since it is larger than the sum of its proper divisors (1746979).

12143261 is a wasteful number, since it uses less digits than its factorization.

12143261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476.

The product of its digits is 288, while the sum is 20.

The square root of 12143261 is about 3484.7182095544. The cubic root of 12143261 is about 229.8503184890.

Adding to 12143261 its reverse (16234121), we get a palindrome (28377382).

The spelling of 12143261 in words is "twelve million, one hundred forty-three thousand, two hundred sixty-one".