671418 has 24 divisors (see below), whose sum is σ = 1587456. Its totient is φ = 203400.

The previous prime is 671417. The next prime is 671431. The reversal of 671418 is 814176.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 671391 and 671400.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 671418.

It is not an unprimeable number, because it can be changed into a prime (671417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1498 + ... + 1893.

It is an arithmetic number, because the mean of its divisors is an integer number (66144).

2⁶⁷¹⁴¹⁸ is an apocalyptic number.

671418 is an abundant number, since it is smaller than the sum of its proper divisors (916038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671418 is a wasteful number, since it uses less digits than its factorization.

671418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3410 (or 3407 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 671418 is about 819.4010007316. The cubic root of 671418 is about 87.5650889849.

It can be divided in two parts, 671 and 418, that added together give a square (1089 = 33²).

The spelling of 671418 in words is "six hundred seventy-one thousand, four hundred eighteen".