671507 has 4 divisors (see below), whose sum is σ = 675696. Its totient is φ = 667320.

The previous prime is 671501. The next prime is 671519. The reversal of 671507 is 705176.

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

It is a cyclic number.

It is not a de Polignac number, because 671507 - 2⁶ = 671443 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 671507.

It is not an unprimeable number, because it can be changed into a prime (671501) 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, 1844 + ... + 2177.

It is an arithmetic number, because the mean of its divisors is an integer number (168924).

2⁶⁷¹⁵⁰⁷ is an apocalyptic number.

671507 is a deficient number, since it is larger than the sum of its proper divisors (4189).

671507 is a wasteful number, since it uses less digits than its factorization.

671507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4188.

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 671507 is about 819.4553068960. The cubic root of 671507 is about 87.5689578856.

The spelling of 671507 in words is "six hundred seventy-one thousand, five hundred seven".