85142 has 4 divisors (see below), whose sum is σ = 127716. Its totient is φ = 42570.

The previous prime is 85133. The next prime is 85147. The reversal of 85142 is 24158.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 85142.

It is not an unprimeable number, because it can be changed into a prime (85147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21284 + ... + 21287.

It is an arithmetic number, because the mean of its divisors is an integer number (31929).

2⁸⁵¹⁴² is an apocalyptic number.

85142 is a deficient number, since it is larger than the sum of its proper divisors (42574).

85142 is a wasteful number, since it uses less digits than its factorization.

85142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42573.

The product of its digits is 320, while the sum is 20.

The square root of 85142 is about 291.7910211093. The cubic root of 85142 is about 43.9927674062.

The spelling of 85142 in words is "eighty-five thousand, one hundred forty-two".