143866 has 4 divisors (see below), whose sum is σ = 215802. Its totient is φ = 71932.

The previous prime is 143833. The next prime is 143873. The reversal of 143866 is 668341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 668341 = 41 ⋅16301.

It can be written as a sum of positive squares in only one way, i.e., 143641 + 225 = 379^2 + 15^2 .

It is a d-powerful number, because it can be written as 1 + 4⁶ + 8⁵ + 3¹⁰ + 6⁴ + 6⁶ .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35965 + ... + 35968.

2¹⁴³⁸⁶⁶ is an apocalyptic number.

143866 is a deficient number, since it is larger than the sum of its proper divisors (71936).

143866 is an equidigital number, since it uses as much as digits as its factorization.

143866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71935.

The product of its digits is 3456, while the sum is 28.

The square root of 143866 is about 379.2967176236. The cubic root of 143866 is about 52.3985645354.

The spelling of 143866 in words is "one hundred forty-three thousand, eight hundred sixty-six".