142381785 has 32 divisors (see below), whose sum is σ = 280385280. Its totient is φ = 60081408.

The previous prime is 142381777. The next prime is 142381823. The reversal of 142381785 is 587183241.

142381785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 142381785 - 2³ = 142381777 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50790 + ... + 53519.

It is an arithmetic number, because the mean of its divisors is an integer number (8762040).

Almost surely, 2^142381785 is an apocalyptic number.

142381785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

142381785 is a deficient number, since it is larger than the sum of its proper divisors (138003495).

142381785 is a wasteful number, since it uses less digits than its factorization.

142381785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104337.

The product of its digits is 53760, while the sum is 39.

The square root of 142381785 is about 11932.3838774991. The cubic root of 142381785 is about 522.1774876843.

The spelling of 142381785 in words is "one hundred forty-two million, three hundred eighty-one thousand, seven hundred eighty-five".