671955 has 8 divisors (see below), whose sum is σ = 1075152. Its totient is φ = 358368.

The previous prime is 671947. The next prime is 671969. The reversal of 671955 is 559176.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 671955 - 2³ = 671947 is a prime.

It is a plaindrome in base 9.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 671955.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22384 + ... + 22413.

It is an arithmetic number, because the mean of its divisors is an integer number (134394).

2⁶⁷¹⁹⁵⁵ is an apocalyptic number.

671955 is a deficient number, since it is larger than the sum of its proper divisors (403197).

671955 is a wasteful number, since it uses less digits than its factorization.

671955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44805.

The product of its digits is 9450, while the sum is 33.

The square root of 671955 is about 819.7286136277. The cubic root of 671955 is about 87.5884276116.

The spelling of 671955 in words is "six hundred seventy-one thousand, nine hundred fifty-five".