2572321 has 8 divisors (see below), whose sum is σ = 2737800. Its totient is φ = 2408448.

The previous prime is 2572307. The next prime is 2572327. The reversal of 2572321 is 1232752.

It can be written as a sum of positive squares in 4 ways, for example, as 541696 + 2030625 = 736^2 + 1425^2 .

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 2572321 - 2⁵ = 2572289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2572292 and 2572301.

It is not an unprimeable number, because it can be changed into a prime (2572327) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5505 + ... + 5953.

It is an arithmetic number, because the mean of its divisors is an integer number (342225).

2^2572321 is an apocalyptic number.

It is an amenable number.

2572321 is a deficient number, since it is larger than the sum of its proper divisors (165479).

2572321 is a wasteful number, since it uses less digits than its factorization.

2572321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803.

The product of its digits is 840, while the sum is 22.

The square root of 2572321 is about 1603.8456908319. The cubic root of 2572321 is about 137.0171893114.

The spelling of 2572321 in words is "two million, five hundred seventy-two thousand, three hundred twenty-one".