142242242 has 4 divisors (see below), whose sum is σ = 213363366. Its totient is φ = 71121120.

The previous prime is 142242211. The next prime is 142242259. The reversal of 142242242 is 242242241.

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

It can be written as a sum of positive squares in only one way, i.e., 100781521 + 41460721 = 10039^2 + 6439^2 .

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 as a sum of consecutive naturals, namely, 35560559 + ... + 35560562.

Almost surely, 2^142242242 is an apocalyptic number.

142242242 is a deficient number, since it is larger than the sum of its proper divisors (71121124).

142242242 is an equidigital number, since it uses as much as digits as its factorization.

142242242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71121123.

The product of its digits is 2048, while the sum is 23.

The square root of 142242242 is about 11926.5352051633. The cubic root of 142242242 is about 522.0068431255.

Adding to 142242242 its reverse (242242241), we get a palindrome (384484483).

Subtracting 142242242 from its reverse (242242241), we obtain a palindrome (99999999).

The spelling of 142242242 in words is "one hundred forty-two million, two hundred forty-two thousand, two hundred forty-two".