671149 has 4 divisors (see below), whose sum is σ = 678780. Its totient is φ = 663520.

The previous prime is 671141. The next prime is 671159. The reversal of 671149 is 941176.

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

It can be written as a sum of positive squares in 2 ways, for example, as 101124 + 570025 = 318^2 + 755^2 .

It is a cyclic number.

It is not a de Polignac number, because 671149 - 2³ = 671141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3682 + ... + 3859.

It is an arithmetic number, because the mean of its divisors is an integer number (169695).

2⁶⁷¹¹⁴⁹ is an apocalyptic number.

It is an amenable number.

671149 is a deficient number, since it is larger than the sum of its proper divisors (7631).

671149 is an equidigital number, since it uses as much as digits as its factorization.

671149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7630.

The product of its digits is 1512, while the sum is 28.

The square root of 671149 is about 819.2368399920. The cubic root of 671149 is about 87.5533932627.

It can be divided in two parts, 671 and 149, that added together give a triangular number (820 = T₄₀).

The spelling of 671149 in words is "six hundred seventy-one thousand, one hundred forty-nine".