142394578 has 4 divisors (see below), whose sum is σ = 213591870. Its totient is φ = 71197288.

The previous prime is 142394509. The next prime is 142394591. The reversal of 142394578 is 875493241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 138462289 + 3932289 = 11767^2 + 1983^2 .

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, 35598643 + ... + 35598646.

Almost surely, 2^142394578 is an apocalyptic number.

142394578 is a deficient number, since it is larger than the sum of its proper divisors (71197292).

142394578 is an equidigital number, since it uses as much as digits as its factorization.

142394578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71197291.

The product of its digits is 241920, while the sum is 43.

The square root of 142394578 is about 11932.9199276623. The cubic root of 142394578 is about 522.1931264275.

The spelling of 142394578 in words is "one hundred forty-two million, three hundred ninety-four thousand, five hundred seventy-eight".