671481 has 6 divisors (see below), whose sum is σ = 969930. Its totient is φ = 447648.

The previous prime is 671477. The next prime is 671501. The reversal of 671481 is 184176.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 665856 + 5625 = 816^2 + 75^2 .

It is not a de Polignac number, because 671481 - 2² = 671477 is a prime.

It is a super-2 number, since 2×671481² = 901773466722, which contains 22 as substring.

It is a Curzon number.

It is a plaindrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 671481.

It is not an unprimeable number, because it can be changed into a prime (671401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37296 + ... + 37313.

It is an arithmetic number, because the mean of its divisors is an integer number (161655).

2⁶⁷¹⁴⁸¹ is an apocalyptic number.

It is an amenable number.

671481 is a deficient number, since it is larger than the sum of its proper divisors (298449).

671481 is a wasteful number, since it uses less digits than its factorization.

671481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74615 (or 74612 counting only the distinct ones).

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

The square root of 671481 is about 819.4394425459. The cubic root of 671481 is about 87.5678276803.

The spelling of 671481 in words is "six hundred seventy-one thousand, four hundred eighty-one".