671142 has 8 divisors (see below), whose sum is σ = 1342296. Its totient is φ = 223712.

The previous prime is 671141. The next prime is 671159. The reversal of 671142 is 241176.

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

671142 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671141) by changing a digit.

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, 55923 + ... + 55934.

It is an arithmetic number, because the mean of its divisors is an integer number (167787).

2⁶⁷¹¹⁴² is an apocalyptic number.

671142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671142 is a wasteful number, since it uses less digits than its factorization.

671142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111862.

The product of its digits is 336, while the sum is 21.

The square root of 671142 is about 819.2325677120. The cubic root of 671142 is about 87.5530888713.

The spelling of 671142 in words is "six hundred seventy-one thousand, one hundred forty-two".