142971211 has 4 divisors (see below), whose sum is σ = 143255952. Its totient is φ = 142686472.

The previous prime is 142971203. The next prime is 142971217. The reversal of 142971211 is 112179241.

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

It is a cyclic number.

It is not a de Polignac number, because 142971211 - 2³ = 142971203 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142971211.

It is not an unprimeable number, because it can be changed into a prime (142971217) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 141616 + ... + 142621.

It is an arithmetic number, because the mean of its divisors is an integer number (35813988).

Almost surely, 2^142971211 is an apocalyptic number.

142971211 is a deficient number, since it is larger than the sum of its proper divisors (284741).

142971211 is an equidigital number, since it uses as much as digits as its factorization.

142971211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284740.

The product of its digits is 1008, while the sum is 28.

The square root of 142971211 is about 11957.0569539498. The cubic root of 142971211 is about 522.8970582941.

The spelling of 142971211 in words is "one hundred forty-two million, nine hundred seventy-one thousand, two hundred eleven".