671726 has 16 divisors (see below), whose sum is σ = 1157760. Its totient is φ = 289080.

The previous prime is 671717. The next prime is 671729. The reversal of 671726 is 627176.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671729) 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, 386 + ... + 1221.

It is an arithmetic number, because the mean of its divisors is an integer number (72360).

2⁶⁷¹⁷²⁶ is an apocalyptic number.

671726 is a deficient number, since it is larger than the sum of its proper divisors (486034).

671726 is a wasteful number, since it uses less digits than its factorization.

671726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639.

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

The square root of 671726 is about 819.5889213502. The cubic root of 671726 is about 87.5784765341.

The spelling of 671726 in words is "six hundred seventy-one thousand, seven hundred twenty-six".