142211071 has 4 divisors (see below), whose sum is σ = 143117032. Its totient is φ = 141305112.

The previous prime is 142211057. The next prime is 142211077. The reversal of 142211071 is 170112241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 170112241 = 13 ⋅13085557.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142211071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142211077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452745 + ... + 453058.

It is an arithmetic number, because the mean of its divisors is an integer number (35779258).

Almost surely, 2^142211071 is an apocalyptic number.

142211071 is a deficient number, since it is larger than the sum of its proper divisors (905961).

142211071 is an equidigital number, since it uses as much as digits as its factorization.

142211071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905960.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 142211071 is about 11925.2283416294. The cubic root of 142211071 is about 521.9687094371.

The spelling of 142211071 in words is "one hundred forty-two million, two hundred eleven thousand, seventy-one".