142137878 has 4 divisors (see below), whose sum is σ = 213206820. Its totient is φ = 71068938.

The previous prime is 142137847. The next prime is 142137881. The reversal of 142137878 is 878731241.

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 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, 35534468 + ... + 35534471.

It is an arithmetic number, because the mean of its divisors is an integer number (53301705).

Almost surely, 2^142137878 is an apocalyptic number.

142137878 is a deficient number, since it is larger than the sum of its proper divisors (71068942).

142137878 is an equidigital number, since it uses as much as digits as its factorization.

142137878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71068941.

The product of its digits is 75264, while the sum is 41.

The square root of 142137878 is about 11922.1591165359. The cubic root of 142137878 is about 521.8791453553.

The spelling of 142137878 in words is "one hundred forty-two million, one hundred thirty-seven thousand, eight hundred seventy-eight".