143818 has 4 divisors (see below), whose sum is σ = 215730. Its totient is φ = 71908.

The previous prime is 143813. The next prime is 143821. The reversal of 143818 is 818341.

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

It can be written as a sum of positive squares in only one way, i.e., 120409 + 23409 = 347^2 + 153^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 143792 and 143801.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35953 + ... + 35956.

2¹⁴³⁸¹⁸ is an apocalyptic number.

143818 is a deficient number, since it is larger than the sum of its proper divisors (71912).

143818 is an equidigital number, since it uses as much as digits as its factorization.

143818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71911.

The product of its digits is 768, while the sum is 25.

The square root of 143818 is about 379.2334373443. The cubic root of 143818 is about 52.3927364016.

It can be divided in two parts, 143 and 818, that added together give a square (961 = 31²).

The spelling of 143818 in words is "one hundred forty-three thousand, eight hundred eighteen".