142751 has 4 divisors (see below), whose sum is σ = 163152. Its totient is φ = 122352.

The previous prime is 142733. The next prime is 142757. The reversal of 142751 is 157241.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 142751.

It is not an unprimeable number, because it can be changed into a prime (142757) 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, 10190 + ... + 10203.

It is an arithmetic number, because the mean of its divisors is an integer number (40788).

2¹⁴²⁷⁵¹ is an apocalyptic number.

142751 is a deficient number, since it is larger than the sum of its proper divisors (20401).

142751 is an equidigital number, since it uses as much as digits as its factorization.

142751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20400.

The product of its digits is 280, while the sum is 20.

The square root of 142751 is about 377.8240331159. The cubic root of 142751 is about 52.2628456775.

Adding to 142751 its reverse (157241), we get a palindrome (299992).

The spelling of 142751 in words is "one hundred forty-two thousand, seven hundred fifty-one".