142188385 has 8 divisors (see below), whose sum is σ = 170807616. Its totient is φ = 113629680.

The previous prime is 142188383. The next prime is 142188433. The reversal of 142188385 is 583881241.

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

It is not a de Polignac number, because 142188385 - 2¹ = 142188383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142188383) 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, 9789 + ... + 19498.

It is an arithmetic number, because the mean of its divisors is an integer number (21350952).

Almost surely, 2^142188385 is an apocalyptic number.

It is an amenable number.

142188385 is a deficient number, since it is larger than the sum of its proper divisors (28619231).

142188385 is an equidigital number, since it uses as much as digits as its factorization.

142188385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30263.

The product of its digits is 61440, while the sum is 40.

The square root of 142188385 is about 11924.2771269373. The cubic root of 142188385 is about 521.9409525455.

The spelling of 142188385 in words is "one hundred forty-two million, one hundred eighty-eight thousand, three hundred eighty-five".