671506 has 16 divisors (see below), whose sum is σ = 1111968. Its totient is φ = 301600.

The previous prime is 671501. The next prime is 671519. The reversal of 671506 is 605176.

671506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (671501) by changing a digit.

671506 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2766 + ... + 2998.

It is an arithmetic number, because the mean of its divisors is an integer number (69498).

2⁶⁷¹⁵⁰⁶ is an apocalyptic number.

671506 is a deficient number, since it is larger than the sum of its proper divisors (440462).

671506 is a wasteful number, since it uses less digits than its factorization.

671506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 671506 is about 819.4546967344. The cubic root of 671506 is about 87.5689144167.

The spelling of 671506 in words is "six hundred seventy-one thousand, five hundred six".