142730218 has 4 divisors (see below), whose sum is σ = 214095330. Its totient is φ = 71365108.

The previous prime is 142730213. The next prime is 142730221. The reversal of 142730218 is 812037241.

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., 125148969 + 17581249 = 11187^2 + 4193^2 .

It is not an unprimeable number, because it can be changed into a prime (142730213) by changing a digit.

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, 35682553 + ... + 35682556.

Almost surely, 2^142730218 is an apocalyptic number.

142730218 is a deficient number, since it is larger than the sum of its proper divisors (71365112).

142730218 is an equidigital number, since it uses as much as digits as its factorization.

142730218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71365111.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 142730218 is about 11946.9752657315. The cubic root of 142730218 is about 522.6030937497.

Adding to 142730218 its reverse (812037241), we get a palindrome (954767459).

The spelling of 142730218 in words is "one hundred forty-two million, seven hundred thirty thousand, two hundred eighteen".