142785172 has 12 divisors (see below), whose sum is σ = 250487860. Its totient is φ = 71217216.

The previous prime is 142785161. The next prime is 142785191. The reversal of 142785172 is 271587241.

It can be written as a sum of positive squares in 2 ways, for example, as 134235396 + 8549776 = 11586^2 + 2924^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42003 + ... + 45274.

Almost surely, 2^142785172 is an apocalyptic number.

It is an amenable number.

142785172 is a deficient number, since it is larger than the sum of its proper divisors (107702688).

142785172 is a wasteful number, since it uses less digits than its factorization.

142785172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87690 (or 87688 counting only the distinct ones).

The product of its digits is 31360, while the sum is 37.

The square root of 142785172 is about 11949.2749570842. The cubic root of 142785172 is about 522.6701560387.

The spelling of 142785172 in words is "one hundred forty-two million, seven hundred eighty-five thousand, one hundred seventy-two".