143812 has 12 divisors (see below), whose sum is σ = 254380. Its totient is φ = 71136.

The previous prime is 143807. The next prime is 143813. The reversal of 143812 is 218341.

It can be written as a sum of positive squares in 2 ways, for example, as 93636 + 50176 = 306^2 + 224^2 .

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 143812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143813) by changing a digit.

143812 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 514 + ... + 742.

2¹⁴³⁸¹² is an apocalyptic number.

It is an amenable number.

143812 is a deficient number, since it is larger than the sum of its proper divisors (110568).

143812 is a wasteful number, since it uses less digits than its factorization.

143812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390 (or 388 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

The square root of 143812 is about 379.2255265670. The cubic root of 143812 is about 52.3920077938.

Subtracting 143812 from its reverse (218341), we obtain a square (74529 = 273²).

The spelling of 143812 in words is "one hundred forty-three thousand, eight hundred twelve".