1671320 has 64 divisors (see below), whose sum is σ = 4423680. Its totient is φ = 556416.

The previous prime is 1671311. The next prime is 1671337. The reversal of 1671320 is 231761.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1671292 and 1671301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13097 + ... + 13223.

It is an arithmetic number, because the mean of its divisors is an integer number (69120).

2^1671320 is an apocalyptic number.

1671320 is a gapful number since it is divisible by the number (10) 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 1671320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2211840).

1671320 is an abundant number, since it is smaller than the sum of its proper divisors (2752360).

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

1671320 is a wasteful number, since it uses less digits than its factorization.

1671320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 1671320 is about 1292.7954207840. The cubic root of 1671320 is about 118.6733503509.

It can be divided in two parts, 1671 and 320, that added together give a palindrome (1991).

The spelling of 1671320 in words is "one million, six hundred seventy-one thousand, three hundred twenty".