671139 has 32 divisors (see below), whose sum is σ = 1175040. Its totient is φ = 370656.

The previous prime is 671131. The next prime is 671141. The reversal of 671139 is 931176.

It is not a de Polignac number, because 671139 - 2³ = 671131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (671131) 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 31 ways as a sum of consecutive naturals, for example, 9984 + ... + 10050.

It is an arithmetic number, because the mean of its divisors is an integer number (36720).

2⁶⁷¹¹³⁹ is an apocalyptic number.

671139 is a deficient number, since it is larger than the sum of its proper divisors (503901).

671139 is a wasteful number, since it uses less digits than its factorization.

671139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 130 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 671139 is about 819.2307367281. The cubic root of 671139 is about 87.5529584172.

The spelling of 671139 in words is "six hundred seventy-one thousand, one hundred thirty-nine".