142671658 has 4 divisors (see below), whose sum is σ = 214007490. Its totient is φ = 71335828.

The previous prime is 142671647. The next prime is 142671679. The reversal of 142671658 is 856176241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 856176241 = 919 ⋅931639.

It can be written as a sum of positive squares in only one way, i.e., 125507209 + 17164449 = 11203^2 + 4143^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 142671658.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35667913 + ... + 35667916.

Almost surely, 2^142671658 is an apocalyptic number.

142671658 is a deficient number, since it is larger than the sum of its proper divisors (71335832).

142671658 is an equidigital number, since it uses as much as digits as its factorization.

142671658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71335831.

The product of its digits is 80640, while the sum is 40.

The square root of 142671658 is about 11944.5241847467. The cubic root of 142671658 is about 522.5316119851.

The spelling of 142671658 in words is "one hundred forty-two million, six hundred seventy-one thousand, six hundred fifty-eight".