671574 has 32 divisors (see below), whose sum is σ = 1457280. Its totient is φ = 205632.

The previous prime is 671557. The next prime is 671581. The reversal of 671574 is 475176.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

671574 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 in 15 ways as a sum of consecutive naturals, for example, 4834 + ... + 4970.

It is an arithmetic number, because the mean of its divisors is an integer number (45540).

2⁶⁷¹⁵⁷⁴ is an apocalyptic number.

671574 is an abundant number, since it is smaller than the sum of its proper divisors (785706).

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

671574 is a wasteful number, since it uses less digits than its factorization.

671574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204.

The product of its digits is 5880, while the sum is 30.

The square root of 671574 is about 819.4961866903. The cubic root of 671574 is about 87.5718702032.

It can be divided in two parts, 67157 and 4, that added together give a triangular number (67161 = T₃₆₆).

The spelling of 671574 in words is "six hundred seventy-one thousand, five hundred seventy-four".