142156040305 has 4 divisors (see below), whose sum is σ = 170587248372. Its totient is φ = 113724832240.

The previous prime is 142156040297. The next prime is 142156040311. The reversal of 142156040305 is 503040651241.

It is a happy number.

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 61496064256 + 80659976049 = 247984^2 + 284007^2 .

It is not a de Polignac number, because 142156040305 - 2³ = 142156040297 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14215604026 + ... + 14215604035.

It is an arithmetic number, because the mean of its divisors is an integer number (42646812093).

Almost surely, 2^142156040305 is an apocalyptic number.

It is an amenable number.

142156040305 is a deficient number, since it is larger than the sum of its proper divisors (28431208067).

142156040305 is an equidigital number, since it uses as much as digits as its factorization.

142156040305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28431208066.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 142156040305 its reverse (503040651241), we get a palindrome (645196691546).

The spelling of 142156040305 in words is "one hundred forty-two billion, one hundred fifty-six million, forty thousand, three hundred five".