671455 has 4 divisors (see below), whose sum is σ = 805752. Its totient is φ = 537160.

The previous prime is 671443. The next prime is 671467. The reversal of 671455 is 554176.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (671443) and next prime (671467).

It is not a de Polignac number, because 671455 - 2¹³ = 663263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67141 + ... + 67150.

It is an arithmetic number, because the mean of its divisors is an integer number (201438).

2⁶⁷¹⁴⁵⁵ is an apocalyptic number.

671455 is a deficient number, since it is larger than the sum of its proper divisors (134297).

671455 is a wasteful number, since it uses less digits than its factorization.

671455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134296.

The product of its digits is 4200, while the sum is 28.

The square root of 671455 is about 819.4235778887. The cubic root of 671455 is about 87.5666974458.

The spelling of 671455 in words is "six hundred seventy-one thousand, four hundred fifty-five".