671430 has 16 divisors (see below), whose sum is σ = 1611504. Its totient is φ = 179040.

The previous prime is 671417. The next prime is 671431. The reversal of 671430 is 34176.

It is a junction number, because it is equal to n+sod(n) for n = 671397 and 671406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671431) by changing a digit.

671430 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 11161 + ... + 11220.

It is an arithmetic number, because the mean of its divisors is an integer number (100719).

2⁶⁷¹⁴³⁰ is an apocalyptic number.

671430 is an abundant number, since it is smaller than the sum of its proper divisors (940074).

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

671430 is a wasteful number, since it uses less digits than its factorization.

671430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22391.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 671430 is about 819.4083231210. The cubic root of 671430 is about 87.5656106544.

The spelling of 671430 in words is "six hundred seventy-one thousand, four hundred thirty".