142993385 has 4 divisors (see below), whose sum is σ = 171592068. Its totient is φ = 114394704.

The previous prime is 142993379. The next prime is 142993393. The reversal of 142993385 is 583399241.

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

It can be written as a sum of positive squares in 2 ways, for example, as 101687056 + 41306329 = 10084^2 + 6427^2 .

It is a cyclic number.

It is not a de Polignac number, because 142993385 - 2⁶ = 142993321 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14299334 + ... + 14299343.

It is an arithmetic number, because the mean of its divisors is an integer number (42898017).

Almost surely, 2^142993385 is an apocalyptic number.

It is an amenable number.

142993385 is a deficient number, since it is larger than the sum of its proper divisors (28598683).

142993385 is an equidigital number, since it uses as much as digits as its factorization.

142993385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28598682.

The product of its digits is 233280, while the sum is 44.

The square root of 142993385 is about 11957.9841528579. The cubic root of 142993385 is about 522.9240896569.

The spelling of 142993385 in words is "one hundred forty-two million, nine hundred ninety-three thousand, three hundred eighty-five".