142821618 has 16 divisors (see below), whose sum is σ = 290326656. Its totient is φ = 46826640.

The previous prime is 142821599. The next prime is 142821629. The reversal of 142821618 is 816128241.

It is a super-3 number, since 3×142821618³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 194746 + ... + 195477.

It is an arithmetic number, because the mean of its divisors is an integer number (18145416).

Almost surely, 2^142821618 is an apocalyptic number.

142821618 is an abundant number, since it is smaller than the sum of its proper divisors (147505038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142821618 is a wasteful number, since it uses less digits than its factorization.

142821618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390289.

The product of its digits is 6144, while the sum is 33.

The square root of 142821618 is about 11950.7998895471. The cubic root of 142821618 is about 522.7146228782.

Adding to 142821618 its reverse (816128241), we get a palindrome (958949859).

The spelling of 142821618 in words is "one hundred forty-two million, eight hundred twenty-one thousand, six hundred eighteen".