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142793 = 720399
BaseRepresentation
bin100010110111001001
321020212122
4202313021
514032133
63021025
71133210
oct426711
9236778
10142793
1198312
126a775
134ccc1
143a077
152c498
hex22dc9

142793 has 4 divisors (see below), whose sum is σ = 163200. Its totient is φ = 122388.

The previous prime is 142789. The next prime is 142799. The reversal of 142793 is 397241.

142793 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 397241 = 1330557.

It is not a de Polignac number, because 142793 - 22 = 142789 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (142799) 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, 10193 + ... + 10206.

It is an arithmetic number, because the mean of its divisors is an integer number (40800).

2142793 is an apocalyptic number.

It is an amenable number.

142793 is a deficient number, since it is larger than the sum of its proper divisors (20407).

142793 is an equidigital number, since it uses as much as digits as its factorization.

142793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20406.

The product of its digits is 1512, while the sum is 26.

The square root of 142793 is about 377.8796104581. The cubic root of 142793 is about 52.2679707421.

The spelling of 142793 in words is "one hundred forty-two thousand, seven hundred ninety-three".

Divisors: 1 7 20399 142793