142712105 has 4 divisors (see below), whose sum is σ = 171254532. Its totient is φ = 114169680.

The previous prime is 142712083. The next prime is 142712111. The reversal of 142712105 is 501217241.

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

It can be written as a sum of positive squares in 2 ways, for example, as 95981209 + 46730896 = 9797^2 + 6836^2 .

It is not a de Polignac number, because 142712105 - 2¹² = 142708009 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 14271206 + ... + 14271215.

It is an arithmetic number, because the mean of its divisors is an integer number (42813633).

Almost surely, 2^142712105 is an apocalyptic number.

It is an amenable number.

142712105 is a deficient number, since it is larger than the sum of its proper divisors (28542427).

142712105 is an equidigital number, since it uses as much as digits as its factorization.

142712105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28542426.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 142712105 is about 11946.2171836946. The cubic root of 142712105 is about 522.5809860503.

Adding to 142712105 its reverse (501217241), we get a palindrome (643929346).

The spelling of 142712105 in words is "one hundred forty-two million, seven hundred twelve thousand, one hundred five".