143539 has 4 divisors (see below), whose sum is σ = 156600. Its totient is φ = 130480.

The previous prime is 143537. The next prime is 143551. The reversal of 143539 is 935341.

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

It is a cyclic number.

It is not a de Polignac number, because 143539 - 2¹ = 143537 is a prime.

It is a d-powerful number, because it can be written as 1 + 4⁶ + 5⁷ + 3⁷ + 3¹⁰ + 9² .

It is a Duffinian number.

143539 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (143537) 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, 6514 + ... + 6535.

It is an arithmetic number, because the mean of its divisors is an integer number (39150).

2¹⁴³⁵³⁹ is an apocalyptic number.

143539 is a deficient number, since it is larger than the sum of its proper divisors (13061).

143539 is a wasteful number, since it uses less digits than its factorization.

143539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13060.

The product of its digits is 1620, while the sum is 25.

The square root of 143539 is about 378.8654114590. The cubic root of 143539 is about 52.3588346737.

It can be divided in two parts, 143 and 539, that multiplied together give a palindrome (77077).

The spelling of 143539 in words is "one hundred forty-three thousand, five hundred thirty-nine".