671412 has 24 divisors (see below), whose sum is σ = 1790656. Its totient is φ = 191808.

The previous prime is 671401. The next prime is 671417. The reversal of 671412 is 214176.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671417) 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 7 ways as a sum of consecutive naturals, for example, 3913 + ... + 4080.

2⁶⁷¹⁴¹² is an apocalyptic number.

It is an amenable number.

671412 is an abundant number, since it is smaller than the sum of its proper divisors (1119244).

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

671412 is a wasteful number, since it uses less digits than its factorization.

671412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8007 (or 8005 counting only the distinct ones).

The product of its digits is 336, while the sum is 21.

The square root of 671412 is about 819.3973395124. The cubic root of 671412 is about 87.5648281479.

Adding to 671412 its reverse (214176), we get a palindrome (885588).

The spelling of 671412 in words is "six hundred seventy-one thousand, four hundred twelve".