142786331 has 4 divisors (see below), whose sum is σ = 143584200. Its totient is φ = 141988464.

The previous prime is 142786327. The next prime is 142786333. The reversal of 142786331 is 133687241.

142786331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 142786331 - 2² = 142786327 is a prime.

It is a super-3 number, since 3×142786331³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142786291 and 142786300.

It is not an unprimeable number, because it can be changed into a prime (142786333) 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, 398666 + ... + 399023.

It is an arithmetic number, because the mean of its divisors is an integer number (35896050).

Almost surely, 2^142786331 is an apocalyptic number.

142786331 is a deficient number, since it is larger than the sum of its proper divisors (797869).

142786331 is an equidigital number, since it uses as much as digits as its factorization.

142786331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797868.

The product of its digits is 24192, while the sum is 35.

The square root of 142786331 is about 11949.3234536521. The cubic root of 142786331 is about 522.6715702217.

The spelling of 142786331 in words is "one hundred forty-two million, seven hundred eighty-six thousand, three hundred thirty-one".