142957285 has 4 divisors (see below), whose sum is σ = 171548748. Its totient is φ = 114365824.

The previous prime is 142957279. The next prime is 142957289. The reversal of 142957285 is 582759241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 582759241 = 19 ⋅30671539.

It can be written as a sum of positive squares in 2 ways, for example, as 71334916 + 71622369 = 8446^2 + 8463^2 .

It is a cyclic number.

It is not a de Polignac number, because 142957285 - 2⁹ = 142956773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142957289) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 14295724 + ... + 14295733.

It is an arithmetic number, because the mean of its divisors is an integer number (42887187).

Almost surely, 2^142957285 is an apocalyptic number.

It is an amenable number.

142957285 is a deficient number, since it is larger than the sum of its proper divisors (28591463).

142957285 is an equidigital number, since it uses as much as digits as its factorization.

142957285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28591462.

The product of its digits is 201600, while the sum is 43.

The square root of 142957285 is about 11956.4746058360. The cubic root of 142957285 is about 522.8800802820.

The spelling of 142957285 in words is "one hundred forty-two million, nine hundred fifty-seven thousand, two hundred eighty-five".