142977 has 4 divisors (see below), whose sum is σ = 190640. Its totient is φ = 95316.

The previous prime is 142973. The next prime is 142979. The reversal of 142977 is 779241.

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 not a de Polignac number, because 142977 - 2² = 142973 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 142977.

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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23827 + ... + 23832.

It is an arithmetic number, because the mean of its divisors is an integer number (47660).

2¹⁴²⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

142977 is a deficient number, since it is larger than the sum of its proper divisors (47663).

142977 is an equidigital number, since it uses as much as digits as its factorization.

142977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47662.

The product of its digits is 3528, while the sum is 30.

The square root of 142977 is about 378.1229958625. The cubic root of 142977 is about 52.2904115683.

The spelling of 142977 in words is "one hundred forty-two thousand, nine hundred seventy-seven".