142236305 has 8 divisors (see below), whose sum is σ = 172341312. Its totient is φ = 112683888.

The previous prime is 142236293. The next prime is 142236349. The reversal of 142236305 is 503632241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142236305 - 2⁸ = 142236049 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 7 ways as a sum of consecutive naturals, for example, 137579 + ... + 138608.

It is an arithmetic number, because the mean of its divisors is an integer number (21542664).

Almost surely, 2^142236305 is an apocalyptic number.

It is an amenable number.

142236305 is a deficient number, since it is larger than the sum of its proper divisors (30105007).

142236305 is a wasteful number, since it uses less digits than its factorization.

142236305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276295.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 142236305 is about 11926.2863037913. The cubic root of 142236305 is about 521.9995804032. Note that the first 3 decimals are identical.

Adding to 142236305 its reverse (503632241), we get a palindrome (645868546).

The spelling of 142236305 in words is "one hundred forty-two million, two hundred thirty-six thousand, three hundred five".