143705 has 8 divisors (see below), whose sum is σ = 176904. Its totient is φ = 112000.

The previous prime is 143699. The next prime is 143711. The reversal of 143705 is 507341.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (143699) and next prime (143711).

It can be written as a sum of positive squares in 4 ways, for example, as 8281 + 135424 = 91^2 + 368^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 143705 - 2¹² = 139609 is a prime.

It is a super-2 number, since 2×143705² = 41302254050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146 + ... + 555.

It is an arithmetic number, because the mean of its divisors is an integer number (22113).

2¹⁴³⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

143705 is a deficient number, since it is larger than the sum of its proper divisors (33199).

143705 is an equidigital number, since it uses as much as digits as its factorization.

143705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 143705 is about 379.0844233149. The cubic root of 143705 is about 52.3790108817.

It can be divided in two parts, 143 and 705, that added together give a palindrome (848).

The spelling of 143705 in words is "one hundred forty-three thousand, seven hundred five".