2061321 has 4 divisors (see below), whose sum is σ = 2748432. Its totient is φ = 1374212.

The previous prime is 2061313. The next prime is 2061331. The reversal of 2061321 is 1231602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2061321 - 2³ = 2061313 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 2061321.

It is not an unprimeable number, because it can be changed into a prime (2061331) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 343551 + ... + 343556.

It is an arithmetic number, because the mean of its divisors is an integer number (687108).

2^2061321 is an apocalyptic number.

It is an amenable number.

2061321 is a deficient number, since it is larger than the sum of its proper divisors (687111).

2061321 is an equidigital number, since it uses as much as digits as its factorization.

2061321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687110.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2061321 is about 1435.7301278444. The cubic root of 2061321 is about 127.2668248809.

Adding to 2061321 its reverse (1231602), we get a palindrome (3292923).

The spelling of 2061321 in words is "two million, sixty-one thousand, three hundred twenty-one".