142009211 has 16 divisors (see below), whose sum is σ = 159465600. Its totient is φ = 125670528.

The previous prime is 142009193. The next prime is 142009237. The reversal of 142009211 is 112900241.

It is not a de Polignac number, because 142009211 - 2²² = 137814907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142009411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43316 + ... + 46478.

It is an arithmetic number, because the mean of its divisors is an integer number (9966600).

Almost surely, 2^142009211 is an apocalyptic number.

142009211 is a deficient number, since it is larger than the sum of its proper divisors (17456389).

142009211 is a wasteful number, since it uses less digits than its factorization.

142009211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3338.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 142009211 is about 11916.7617665203. The cubic root of 142009211 is about 521.7216248391.

Adding to 142009211 its reverse (112900241), we get a palindrome (254909452).

The spelling of 142009211 in words is "one hundred forty-two million, nine thousand, two hundred eleven".