671365 has 16 divisors (see below), whose sum is σ = 875520. Its totient is φ = 492480.

The previous prime is 671357. The next prime is 671369. The reversal of 671365 is 563176.

671365 = T₉₆ + T₉₇ + ... + T₁₆₉.

671365 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 671365 - 2³ = 671357 is a prime.

Its product of digits (3780) is a multiple of the sum of its prime divisors (252).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3420 + ... + 3610.

It is an arithmetic number, because the mean of its divisors is an integer number (54720).

2⁶⁷¹³⁶⁵ is an apocalyptic number.

It is an amenable number.

671365 is a deficient number, since it is larger than the sum of its proper divisors (204155).

671365 is a wasteful number, since it uses less digits than its factorization.

671365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252.

The product of its digits is 3780, while the sum is 28.

The square root of 671365 is about 819.3686593958. The cubic root of 671365 is about 87.5627848705.

The spelling of 671365 in words is "six hundred seventy-one thousand, three hundred sixty-five".