142891271 has 4 divisors (see below), whose sum is σ = 142915344. Its totient is φ = 142867200.

The previous prime is 142891247. The next prime is 142891283. The reversal of 142891271 is 172198241.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142891271 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 (142891201) 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, 3911 + ... + 17351.

It is an arithmetic number, because the mean of its divisors is an integer number (35728836).

Almost surely, 2^142891271 is an apocalyptic number.

142891271 is a deficient number, since it is larger than the sum of its proper divisors (24073).

142891271 is a wasteful number, since it uses less digits than its factorization.

142891271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24072.

The product of its digits is 8064, while the sum is 35.

The square root of 142891271 is about 11953.7136907323. The cubic root of 142891271 is about 522.7995836962.

The spelling of 142891271 in words is "one hundred forty-two million, eight hundred ninety-one thousand, two hundred seventy-one".