142886393 has 8 divisors (see below), whose sum is σ = 159184200. Its totient is φ = 127346688.

The previous prime is 142886371. The next prime is 142886407. The reversal of 142886393 is 393688241.

It can be written as a sum of positive squares in 4 ways, for example, as 39904489 + 102981904 = 6317^2 + 10148^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142886393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142886323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189128 + ... + 189881.

It is an arithmetic number, because the mean of its divisors is an integer number (19898025).

Almost surely, 2^142886393 is an apocalyptic number.

142886393 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

142886393 is a deficient number, since it is larger than the sum of its proper divisors (16297807).

142886393 is a wasteful number, since it uses less digits than its factorization.

142886393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379051.

The product of its digits is 248832, while the sum is 44.

The square root of 142886393 is about 11953.5096519809. The cubic root of 142886393 is about 522.7936345448.

The spelling of 142886393 in words is "one hundred forty-two million, eight hundred eighty-six thousand, three hundred ninety-three".