142009618 has 4 divisors (see below), whose sum is σ = 213014430. Its totient is φ = 71004808.

The previous prime is 142009603. The next prime is 142009627. The reversal of 142009618 is 816900241.

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 only one way, i.e., 124478649 + 17530969 = 11157^2 + 4187^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 142009618.

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, 35502403 + ... + 35502406.

Almost surely, 2^142009618 is an apocalyptic number.

142009618 is a deficient number, since it is larger than the sum of its proper divisors (71004812).

142009618 is an equidigital number, since it uses as much as digits as its factorization.

142009618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71004811.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 142009618 is about 11916.7788432949. The cubic root of 142009618 is about 521.7221232586.

Adding to 142009618 its reverse (816900241), we get a palindrome (958909859).

The spelling of 142009618 in words is "one hundred forty-two million, nine thousand, six hundred eighteen".