142971 has 4 divisors (see below), whose sum is σ = 190632. Its totient is φ = 95312.

The previous prime is 142969. The next prime is 142973. The reversal of 142971 is 179241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179241 = 3 ⋅59747.

It is an interprime number because it is at equal distance from previous prime (142969) and next prime (142973).

It is a cyclic number.

It is not a de Polignac number, because 142971 - 2¹ = 142969 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (142973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23826 + ... + 23831.

It is an arithmetic number, because the mean of its divisors is an integer number (47658).

2¹⁴²⁹⁷¹ is an apocalyptic number.

142971 is a deficient number, since it is larger than the sum of its proper divisors (47661).

142971 is an equidigital number, since it uses as much as digits as its factorization.

142971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47660.

The product of its digits is 504, while the sum is 24.

The square root of 142971 is about 378.1150618529. The cubic root of 142971 is about 52.2896801060.

The spelling of 142971 in words is "one hundred forty-two thousand, nine hundred seventy-one".