142284278 has 4 divisors (see below), whose sum is σ = 213426420. Its totient is φ = 71142138.

The previous prime is 142284257. The next prime is 142284313. The reversal of 142284278 is 872482241.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35571068 + ... + 35571071.

It is an arithmetic number, because the mean of its divisors is an integer number (53356605).

Almost surely, 2^142284278 is an apocalyptic number.

142284278 is a deficient number, since it is larger than the sum of its proper divisors (71142142).

142284278 is an equidigital number, since it uses as much as digits as its factorization.

142284278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71142141.

The product of its digits is 57344, while the sum is 38.

The square root of 142284278 is about 11928.2973638319. The cubic root of 142284278 is about 522.0582599155.

The spelling of 142284278 in words is "one hundred forty-two million, two hundred eighty-four thousand, two hundred seventy-eight".