142449985 has 8 divisors (see below), whose sum is σ = 171064296. Its totient is φ = 113877120.

The previous prime is 142449977. The next prime is 142450043. The reversal of 142449985 is 589944241.

142449985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 744769 + 141705216 = 863^2 + 11904^2 .

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

It is not a de Polignac number, because 142449985 - 2³ = 142449977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2214 + ... + 17023.

It is an arithmetic number, because the mean of its divisors is an integer number (21383037).

Almost surely, 2^142449985 is an apocalyptic number.

It is an amenable number.

142449985 is a deficient number, since it is larger than the sum of its proper divisors (28614311).

142449985 is a wasteful number, since it uses less digits than its factorization.

142449985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20723.

The product of its digits is 414720, while the sum is 46.

The square root of 142449985 is about 11935.2413046406. The cubic root of 142449985 is about 522.2608476452.

The spelling of 142449985 in words is "one hundred forty-two million, four hundred forty-nine thousand, nine hundred eighty-five".