142931285 has 24 divisors (see below), whose sum is σ = 206410680. Its totient is φ = 94625664.

The previous prime is 142931279. The next prime is 142931293. The reversal of 142931285 is 582139241.

It can be written as a sum of positive squares in 4 ways, for example, as 4468996 + 138462289 = 2114^2 + 11767^2 .

It is not a de Polignac number, because 142931285 - 2⁸ = 142931029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2954 + ... + 17163.

It is an arithmetic number, because the mean of its divisors is an integer number (8600445).

Almost surely, 2^142931285 is an apocalyptic number.

It is an amenable number.

142931285 is a deficient number, since it is larger than the sum of its proper divisors (63479395).

142931285 is a wasteful number, since it uses less digits than its factorization.

142931285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20165 (or 20158 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 142931285 is about 11955.3872793816. The cubic root of 142931285 is about 522.8483791895.

The spelling of 142931285 in words is "one hundred forty-two million, nine hundred thirty-one thousand, two hundred eighty-five".