142643273 has 4 divisors (see below), whose sum is σ = 142669188. Its totient is φ = 142617360.

The previous prime is 142643239. The next prime is 142643287. The reversal of 142643273 is 372346241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 372346241 = 23 ⋅16188967.

It can be written as a sum of positive squares in 2 ways, for example, as 104796169 + 37847104 = 10237^2 + 6152^2 .

It is a cyclic number.

It is not a de Polignac number, because 142643273 - 2¹² = 142639177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142643233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1058 + ... + 16923.

It is an arithmetic number, because the mean of its divisors is an integer number (35667297).

Almost surely, 2^142643273 is an apocalyptic number.

It is an amenable number.

142643273 is a deficient number, since it is larger than the sum of its proper divisors (25915).

142643273 is an equidigital number, since it uses as much as digits as its factorization.

142643273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25914.

The product of its digits is 24192, while the sum is 32.

The square root of 142643273 is about 11943.3359242717. The cubic root of 142643273 is about 522.4969565538.

The spelling of 142643273 in words is "one hundred forty-two million, six hundred forty-three thousand, two hundred seventy-three".