671652 has 36 divisors (see below), whose sum is σ = 1763216. Its totient is φ = 223560.

The previous prime is 671651. The next prime is 671681. The reversal of 671652 is 256176.

671652 is a `hidden beast` number, since 6 + 7 + 1 + 652 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×671652² = 902232818208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (671651) 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 11 ways as a sum of consecutive naturals, for example, 627 + ... + 1317.

2⁶⁷¹⁶⁵² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (881608).

671652 is an abundant number, since it is smaller than the sum of its proper divisors (1091564).

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

671652 is a wasteful number, since it uses less digits than its factorization.

671652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710 (or 696 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 671652 is about 819.5437755239. The cubic root of 671652 is about 87.5752604186.

The spelling of 671652 in words is "six hundred seventy-one thousand, six hundred fifty-two".