142813 has 4 divisors (see below), whose sum is σ = 155808. Its totient is φ = 129820.

The previous prime is 142811. The next prime is 142837. The reversal of 142813 is 318241.

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 a cyclic number.

It is not a de Polignac number, because 142813 - 2¹ = 142811 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a nialpdrome in base 11.

It is a zygodrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142811) 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, 6481 + ... + 6502.

It is an arithmetic number, because the mean of its divisors is an integer number (38952).

2¹⁴²⁸¹³ is an apocalyptic number.

It is an amenable number.

142813 is a deficient number, since it is larger than the sum of its proper divisors (12995).

142813 is a wasteful number, since it uses less digits than its factorization.

142813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12994.

The product of its digits is 192, while the sum is 19.

The square root of 142813 is about 377.9060729864. The cubic root of 142813 is about 52.2704108958.

It can be divided in two parts, 1428 and 13, that added together give a palindrome (1441).

The spelling of 142813 in words is "one hundred forty-two thousand, eight hundred thirteen".