671051 has 4 divisors (see below), whose sum is σ = 672792. Its totient is φ = 669312.

The previous prime is 671039. The next prime is 671059. The reversal of 671051 is 150176.

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

It is a cyclic number.

It is not a de Polignac number, because 671051 - 2⁶ = 670987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5 + ... + 1158.

It is an arithmetic number, because the mean of its divisors is an integer number (168198).

2⁶⁷¹⁰⁵¹ is an apocalyptic number.

671051 is a deficient number, since it is larger than the sum of its proper divisors (1741).

671051 is a wasteful number, since it uses less digits than its factorization.

671051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 671051 is about 819.1770260450. The cubic root of 671051 is about 87.5491315909.

The spelling of 671051 in words is "six hundred seventy-one thousand, fifty-one".