671424 has 56 divisors (see below), whose sum is σ = 1920240. Its totient is φ = 205824.

The previous prime is 671417. The next prime is 671431. The reversal of 671424 is 424176.

It is an interprime number because it is at equal distance from previous prime (671417) and next prime (671431).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 671394 and 671403.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 671424.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2362 + ... + 2630.

It is an arithmetic number, because the mean of its divisors is an integer number (34290).

2⁶⁷¹⁴²⁴ is an apocalyptic number.

671424 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (960120).

671424 is an abundant number, since it is smaller than the sum of its proper divisors (1248816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671424 is a wasteful number, since it uses less digits than its factorization.

671424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297 (or 287 counting only the distinct ones).

The product of its digits is 1344, while the sum is 24.

The square root of 671424 is about 819.4046619345. The cubic root of 671424 is about 87.5653498205.

The spelling of 671424 in words is "six hundred seventy-one thousand, four hundred twenty-four".