142972198 has 4 divisors (see below), whose sum is σ = 214458300. Its totient is φ = 71486098.

The previous prime is 142972189. The next prime is 142972211. The reversal of 142972198 is 891279241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 891279241 = 18149 ⋅49109.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35743048 + ... + 35743051.

It is an arithmetic number, because the mean of its divisors is an integer number (53614575).

Almost surely, 2^142972198 is an apocalyptic number.

142972198 is a deficient number, since it is larger than the sum of its proper divisors (71486102).

142972198 is an equidigital number, since it uses as much as digits as its factorization.

142972198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71486101.

The product of its digits is 72576, while the sum is 43.

The square root of 142972198 is about 11957.0982265765. The cubic root of 142972198 is about 522.8982615625.

The spelling of 142972198 in words is "one hundred forty-two million, nine hundred seventy-two thousand, one hundred ninety-eight".