143739 has 6 divisors (see below), whose sum is σ = 207636. Its totient is φ = 95820.

The previous prime is 143729. The next prime is 143743. The reversal of 143739 is 937341.

It is not a de Polignac number, because 143739 - 2⁸ = 143483 is a prime.

It is an Ulam number.

143739 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 143739.

It is not an unprimeable number, because it can be changed into a prime (143719) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7977 + ... + 7994.

It is an arithmetic number, because the mean of its divisors is an integer number (34606).

143739 is a Friedman number, since it can be written as 47913*3, using all its digits and the basic arithmetic operations.

2¹⁴³⁷³⁹ is an apocalyptic number.

143739 is a deficient number, since it is larger than the sum of its proper divisors (63897).

143739 is a wasteful number, since it uses less digits than its factorization.

143739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15977 (or 15974 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 143739 is about 379.1292655546. The cubic root of 143739 is about 52.3831414407.

The spelling of 143739 in words is "one hundred forty-three thousand, seven hundred thirty-nine".