671672 has 16 divisors (see below), whose sum is σ = 1272240. Its totient is φ = 332416.

The previous prime is 671651. The next prime is 671681. The reversal of 671672 is 276176.

It is a super-2 number, since 2×671672² = 902286551168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533 + ... + 1275.

It is an arithmetic number, because the mean of its divisors is an integer number (79515).

2⁶⁷¹⁶⁷² is an apocalyptic number.

It is an amenable number.

671672 is a deficient number, since it is larger than the sum of its proper divisors (600568).

671672 is a wasteful number, since it uses less digits than its factorization.

671672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862 (or 858 counting only the distinct ones).

The product of its digits is 3528, while the sum is 29.

The square root of 671672 is about 819.5559773438. Note that the first 3 decimals coincide. The cubic root of 671672 is about 87.5761296623.

The spelling of 671672 in words is "six hundred seventy-one thousand, six hundred seventy-two".