142687 has 4 divisors (see below), whose sum is σ = 144256. Its totient is φ = 141120.

The previous prime is 142673. The next prime is 142697. The reversal of 142687 is 786241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142687 - 2⁷ = 142559 is a prime.

It is a Duffinian number.

142687 is a lucky number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142607) 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, 639 + ... + 832.

It is an arithmetic number, because the mean of its divisors is an integer number (36064).

2¹⁴²⁶⁸⁷ is an apocalyptic number.

142687 is a deficient number, since it is larger than the sum of its proper divisors (1569).

142687 is an equidigital number, since it uses as much as digits as its factorization.

142687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568.

The product of its digits is 2688, while the sum is 28.

The square root of 142687 is about 377.7393281087. The cubic root of 142687 is about 52.2550341219.

It can be divided in two parts, 14 and 2687, that added together give a triangular number (2701 = T₇₃).

The spelling of 142687 in words is "one hundred forty-two thousand, six hundred eighty-seven".