671961 has 8 divisors (see below), whose sum is σ = 916960. Its totient is φ = 437472.

The previous prime is 671947. The next prime is 671969. The reversal of 671961 is 169176.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 671961 - 2¹¹ = 669913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2476 + ... + 2733.

It is an arithmetic number, because the mean of its divisors is an integer number (114620).

2⁶⁷¹⁹⁶¹ is an apocalyptic number.

It is an amenable number.

671961 is a deficient number, since it is larger than the sum of its proper divisors (244999).

671961 is a wasteful number, since it uses less digits than its factorization.

671961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5255.

The product of its digits is 2268, while the sum is 30.

The square root of 671961 is about 819.7322733673. The cubic root of 671961 is about 87.5886883082.

The spelling of 671961 in words is "six hundred seventy-one thousand, nine hundred sixty-one".