1321573 has 8 divisors (see below), whose sum is σ = 1450080. Its totient is φ = 1194480.

The previous prime is 1321571. The next prime is 1321577. The reversal of 1321573 is 3751231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321573 - 2¹ = 1321571 is a prime.

It is a Duffinian number.

1321573 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3298 + ... + 3676.

It is an arithmetic number, because the mean of its divisors is an integer number (181260).

2^1321573 is an apocalyptic number.

It is an amenable number.

1321573 is a deficient number, since it is larger than the sum of its proper divisors (128507).

1321573 is a wasteful number, since it uses less digits than its factorization.

1321573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707.

The product of its digits is 630, while the sum is 22.

The square root of 1321573 is about 1149.5968858691. The cubic root of 1321573 is about 109.7396874926.

The spelling of 1321573 in words is "one million, three hundred twenty-one thousand, five hundred seventy-three".