671558 has 8 divisors (see below), whose sum is σ = 1010880. Its totient is φ = 334600.

The previous prime is 671557. The next prime is 671581. The reversal of 671558 is 855176.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671557) 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, 608 + ... + 1308.

It is an arithmetic number, because the mean of its divisors is an integer number (126360).

2⁶⁷¹⁵⁵⁸ is an apocalyptic number.

671558 is a deficient number, since it is larger than the sum of its proper divisors (339322).

671558 is a wasteful number, since it uses less digits than its factorization.

671558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182.

The product of its digits is 8400, while the sum is 32.

The square root of 671558 is about 819.4864245367. The cubic root of 671558 is about 87.5711747420.

The spelling of 671558 in words is "six hundred seventy-one thousand, five hundred fifty-eight".