142871491 has 4 divisors (see below), whose sum is σ = 163281712. Its totient is φ = 122461272.

The previous prime is 142871489. The next prime is 142871501. The reversal of 142871491 is 194178241.

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 142871491 - 2¹ = 142871489 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 142871491.

It is not an unprimeable number, because it can be changed into a prime (142871401) 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, 10205100 + ... + 10205113.

It is an arithmetic number, because the mean of its divisors is an integer number (40820428).

Almost surely, 2^142871491 is an apocalyptic number.

142871491 is a deficient number, since it is larger than the sum of its proper divisors (20410221).

142871491 is an equidigital number, since it uses as much as digits as its factorization.

142871491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20410220.

The product of its digits is 16128, while the sum is 37.

The square root of 142871491 is about 11952.8863041527. The cubic root of 142871491 is about 522.7754594025.

The spelling of 142871491 in words is "one hundred forty-two million, eight hundred seventy-one thousand, four hundred ninety-one".