671530 has 8 divisors (see below), whose sum is σ = 1208772. Its totient is φ = 268608.

The previous prime is 671519. The next prime is 671533. The reversal of 671530 is 35176.

It can be written as a sum of positive squares in 2 ways, for example, as 641601 + 29929 = 801^2 + 173^2 .

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

It is not an unprimeable number, because it can be changed into a prime (671533) 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, 33567 + ... + 33586.

2⁶⁷¹⁵³⁰ is an apocalyptic number.

671530 is a deficient number, since it is larger than the sum of its proper divisors (537242).

671530 is a wasteful number, since it uses less digits than its factorization.

671530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67160.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 671530 is about 819.4693404881. The cubic root of 671530 is about 87.5699576583.

The spelling of 671530 in words is "six hundred seventy-one thousand, five hundred thirty".