143855 has 4 divisors (see below), whose sum is σ = 172632. Its totient is φ = 115080.

The previous prime is 143833. The next prime is 143873. The reversal of 143855 is 558341.

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

It is not a de Polignac number, because 143855 - 2⁶ = 143791 is a prime.

It is a super-2 number, since 2×143855² = 41388522050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14381 + ... + 14390.

It is an arithmetic number, because the mean of its divisors is an integer number (43158).

2¹⁴³⁸⁵⁵ is an apocalyptic number.

143855 is a deficient number, since it is larger than the sum of its proper divisors (28777).

143855 is an equidigital number, since it uses as much as digits as its factorization.

143855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28776.

The product of its digits is 2400, while the sum is 26.

The square root of 143855 is about 379.2822168254. The cubic root of 143855 is about 52.3972290359.

It can be divided in two parts, 143 and 855, that multiplied together give a triangular number (122265 = T₄₉₄).

The spelling of 143855 in words is "one hundred forty-three thousand, eight hundred fifty-five".