671426 has 16 divisors (see below), whose sum is σ = 1161600. Its totient is φ = 285120.

The previous prime is 671417. The next prime is 671431. The reversal of 671426 is 624176.

671426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 671395 and 671404.

It is a congruent number.

It is an unprimeable number.

671426 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2666 + ... + 2906.

It is an arithmetic number, because the mean of its divisors is an integer number (72600).

2⁶⁷¹⁴²⁶ is an apocalyptic number.

671426 is a deficient number, since it is larger than the sum of its proper divisors (490174).

671426 is a wasteful number, since it uses less digits than its factorization.

671426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449.

The product of its digits is 2016, while the sum is 26.

The square root of 671426 is about 819.4058823318. The cubic root of 671426 is about 87.5654367653.

The spelling of 671426 in words is "six hundred seventy-one thousand, four hundred twenty-six".