142878334 has 4 divisors (see below), whose sum is σ = 214317504. Its totient is φ = 71439166.

The previous prime is 142878313. The next prime is 142878343. The reversal of 142878334 is 433878241.

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

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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35719582 + ... + 35719585.

It is an arithmetic number, because the mean of its divisors is an integer number (53579376).

Almost surely, 2^142878334 is an apocalyptic number.

142878334 is a deficient number, since it is larger than the sum of its proper divisors (71439170).

142878334 is an equidigital number, since it uses as much as digits as its factorization.

142878334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71439169.

The product of its digits is 129024, while the sum is 40.

The square root of 142878334 is about 11953.1725495786. The cubic root of 142878334 is about 522.7838055867.

The spelling of 142878334 in words is "one hundred forty-two million, eight hundred seventy-eight thousand, three hundred thirty-four".