671970 has 32 divisors (see below), whose sum is σ = 1737792. Its totient is φ = 165312.

The previous prime is 671969. The next prime is 671971. The reversal of 671970 is 79176.

It is an interprime number because it is at equal distance from previous prime (671969) and next prime (671971).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 472 + ... + 1251.

It is an arithmetic number, because the mean of its divisors is an integer number (54306).

2⁶⁷¹⁹⁷⁰ is an apocalyptic number.

671970 is an abundant number, since it is smaller than the sum of its proper divisors (1065822).

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

671970 is a wasteful number, since it uses less digits than its factorization.

671970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746.

The product of its (nonzero) digits is 2646, while the sum is 30.

The square root of 671970 is about 819.7377629462. The cubic root of 671970 is about 87.5890793500.

The spelling of 671970 in words is "six hundred seventy-one thousand, nine hundred seventy".