142678311 has 4 divisors (see below), whose sum is σ = 190237752. Its totient is φ = 95118872.

The previous prime is 142678271. The next prime is 142678313. The reversal of 142678311 is 113876241.

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

It is a cyclic number.

It is not a de Polignac number, because 142678311 - 2¹⁸ = 142416167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142678313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23779716 + ... + 23779721.

It is an arithmetic number, because the mean of its divisors is an integer number (47559438).

Almost surely, 2^142678311 is an apocalyptic number.

142678311 is a deficient number, since it is larger than the sum of its proper divisors (47559441).

142678311 is an equidigital number, since it uses as much as digits as its factorization.

142678311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47559440.

The product of its digits is 8064, while the sum is 33.

The square root of 142678311 is about 11944.8026773154. The cubic root of 142678311 is about 522.5397340112.

Subtracting from 142678311 its sum of digits (33), we obtain a triangular number (142678278 = T₁₆₈₉₂).

It can be divided in two parts, 14267 and 8311, that added together give a triangular number (22578 = T₂₁₂).

The spelling of 142678311 in words is "one hundred forty-two million, six hundred seventy-eight thousand, three hundred eleven".