1321704 has 64 divisors (see below), whose sum is σ = 3816000. Its totient is φ = 423360.

The previous prime is 1321693. The next prime is 1321711. The reversal of 1321704 is 4071231.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6159 + ... + 6369.

It is an arithmetic number, because the mean of its divisors is an integer number (59625).

2^1321704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1908000).

1321704 is an abundant number, since it is smaller than the sum of its proper divisors (2494296).

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

1321704 is a wasteful number, since it uses less digits than its factorization.

1321704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 1321704 is about 1149.6538609512. The cubic root of 1321704 is about 109.7433133294.

Adding to 1321704 its reverse (4071231), we get a palindrome (5392935).

It can be divided in two parts, 1321 and 704, that added together give a square (2025 = 45²).

The spelling of 1321704 in words is "one million, three hundred twenty-one thousand, seven hundred four".