671518 has 8 divisors (see below), whose sum is σ = 1021680. Its totient is φ = 330960.

The previous prime is 671501. The next prime is 671519. The reversal of 671518 is 815176.

It is a happy number.

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 (671519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2223 + ... + 2506.

It is an arithmetic number, because the mean of its divisors is an integer number (127710).

2⁶⁷¹⁵¹⁸ is an apocalyptic number.

671518 is a deficient number, since it is larger than the sum of its proper divisors (350162).

671518 is a wasteful number, since it uses less digits than its factorization.

671518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4802.

The product of its digits is 1680, while the sum is 28.

The square root of 671518 is about 819.4620186439. The cubic root of 671518 is about 87.5694360406.

The spelling of 671518 in words is "six hundred seventy-one thousand, five hundred eighteen".