142187 has 4 divisors (see below), whose sum is σ = 147120. Its totient is φ = 137256.

The previous prime is 142183. The next prime is 142189. The reversal of 142187 is 781241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 781241 = 23 ⋅33967.

It is a cyclic number.

It is not a de Polignac number, because 142187 - 2² = 142183 is a prime.

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 142187.

It is not an unprimeable number, because it can be changed into a prime (142183) 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, 2423 + ... + 2480.

It is an arithmetic number, because the mean of its divisors is an integer number (36780).

2¹⁴²¹⁸⁷ is an apocalyptic number.

142187 is a deficient number, since it is larger than the sum of its proper divisors (4933).

142187 is an equidigital number, since it uses as much as digits as its factorization.

142187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4932.

The product of its digits is 448, while the sum is 23.

The square root of 142187 is about 377.0769152308. The cubic root of 142187 is about 52.1939257867.

The spelling of 142187 in words is "one hundred forty-two thousand, one hundred eighty-seven".