142311505 has 16 divisors (see below), whose sum is σ = 206651520. Its totient is φ = 91844352.

The previous prime is 142311503. The next prime is 142311517. The reversal of 142311505 is 505113241.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 142311505 - 2¹ = 142311503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142311503) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 118995 + ... + 120184.

It is an arithmetic number, because the mean of its divisors is an integer number (12915720).

Almost surely, 2^142311505 is an apocalyptic number.

It is an amenable number.

142311505 is a deficient number, since it is larger than the sum of its proper divisors (64340015).

142311505 is a wasteful number, since it uses less digits than its factorization.

142311505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239208.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 142311505 is about 11929.4385869579. The cubic root of 142311505 is about 522.0915575126.

Adding to 142311505 its reverse (505113241), we get a palindrome (647424746).

The spelling of 142311505 in words is "one hundred forty-two million, three hundred eleven thousand, five hundred five".