671615 has 16 divisors (see below), whose sum is σ = 952320. Its totient is φ = 444960.

The previous prime is 671609. The next prime is 671633. The reversal of 671615 is 516176.

It is not a de Polignac number, because 671615 - 2¹² = 667519 is a prime.

It is a zygodrome in base 6.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 776 + ... + 1394.

It is an arithmetic number, because the mean of its divisors is an integer number (59520).

2⁶⁷¹⁶¹⁵ is an apocalyptic number.

671615 is a deficient number, since it is larger than the sum of its proper divisors (280705).

671615 is a wasteful number, since it uses less digits than its factorization.

671615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662.

The product of its digits is 1260, while the sum is 26.

The square root of 671615 is about 819.5212016782. The cubic root of 671615 is about 87.5736522722.

The spelling of 671615 in words is "six hundred seventy-one thousand, six hundred fifteen".