142939 has 2 divisors, whose sum is σ = 142940. Its totient is φ = 142938.

The previous prime is 142907. The next prime is 142949. The reversal of 142939 is 939241.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142939 - 2⁵ = 142907 is a prime.

142939 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (142949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71469 + 71470.

It is an arithmetic number, because the mean of its divisors is an integer number (71470).

2¹⁴²⁹³⁹ is an apocalyptic number.

142939 is a deficient number, since it is larger than the sum of its proper divisors (1).

142939 is an equidigital number, since it uses as much as digits as its factorization.

142939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 28.

The square root of 142939 is about 378.0727443231. The cubic root of 142939 is about 52.2857786280.

It can be divided in two parts, 142 and 939, that added together give a triangular number (1081 = T₄₆).

The spelling of 142939 in words is "one hundred forty-two thousand, nine hundred thirty-nine".