671752 has 8 divisors (see below), whose sum is σ = 1259550. Its totient is φ = 335872.

The previous prime is 671743. The next prime is 671753. The reversal of 671752 is 257176.

It can be written as a sum of positive squares in only one way, i.e., 427716 + 244036 = 654^2 + 494^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 671752.

It is not an unprimeable number, because it can be changed into a prime (671753) by changing a digit.

671752 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41977 + ... + 41992.

2⁶⁷¹⁷⁵² is an apocalyptic number.

It is an amenable number.

671752 is a deficient number, since it is larger than the sum of its proper divisors (587798).

671752 is a wasteful number, since it uses less digits than its factorization.

671752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83975 (or 83971 counting only the distinct ones).

The product of its digits is 2940, while the sum is 28.

The square root of 671752 is about 819.6047828069. The cubic root of 671752 is about 87.5796064646.

The spelling of 671752 in words is "six hundred seventy-one thousand, seven hundred fifty-two".