142005211 has 4 divisors (see below), whose sum is σ = 142036432. Its totient is φ = 141973992.

The previous prime is 142005169. The next prime is 142005229. The reversal of 142005211 is 112500241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112500241 = 7 ⋅16071463.

It is a cyclic number.

It is not a de Polignac number, because 142005211 - 2⁹ = 142004699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142005251) 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 3 ways as a sum of consecutive naturals, for example, 7320 + ... + 18373.

It is an arithmetic number, because the mean of its divisors is an integer number (35509108).

Almost surely, 2^142005211 is an apocalyptic number.

142005211 is a deficient number, since it is larger than the sum of its proper divisors (31221).

142005211 is an equidigital number, since it uses as much as digits as its factorization.

142005211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31220.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 142005211 is about 11916.5939345100. The cubic root of 142005211 is about 521.7167263162.

Adding to 142005211 its reverse (112500241), we get a palindrome (254505452).

The spelling of 142005211 in words is "one hundred forty-two million, five thousand, two hundred eleven".