671434 has 8 divisors (see below), whose sum is σ = 1017828. Its totient is φ = 332160.

The previous prime is 671431. The next prime is 671443. The reversal of 671434 is 434176.

It can be written as a sum of positive squares in 2 ways, for example, as 648025 + 23409 = 805^2 + 153^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 671399 and 671408.

It is not an unprimeable number, because it can be changed into a prime (671431) 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, 1537 + ... + 1924.

2⁶⁷¹⁴³⁴ is an apocalyptic number.

671434 is a deficient number, since it is larger than the sum of its proper divisors (346394).

671434 is a wasteful number, since it uses less digits than its factorization.

671434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3560.

The product of its digits is 2016, while the sum is 25.

The square root of 671434 is about 819.4107639029. The cubic root of 671434 is about 87.5657845429.

The spelling of 671434 in words is "six hundred seventy-one thousand, four hundred thirty-four".