143857 has 4 divisors (see below), whose sum is σ = 164416. Its totient is φ = 123300.

The previous prime is 143833. The next prime is 143873. The reversal of 143857 is 758341.

143857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 143857 - 2⁷ = 143729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (143807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10269 + ... + 10282.

It is an arithmetic number, because the mean of its divisors is an integer number (41104).

143857 is a Friedman number, since it can be written as 74*8*3^5+1, using all its digits and the basic arithmetic operations.

2¹⁴³⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

143857 is a deficient number, since it is larger than the sum of its proper divisors (20559).

143857 is an equidigital number, since it uses as much as digits as its factorization.

143857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20558.

The product of its digits is 3360, while the sum is 28.

The square root of 143857 is about 379.2848533754. The cubic root of 143857 is about 52.3974718591.

It can be divided in two parts, 143 and 857, that added together give a cube (1000 = 10³).

The spelling of 143857 in words is "one hundred forty-three thousand, eight hundred fifty-seven".