3012721 has 8 divisors (see below), whose sum is σ = 3110184. Its totient is φ = 2916480.

The previous prime is 3012719. The next prime is 3012727. The reversal of 3012721 is 1272103.

It is a happy number.

3012721 is nontrivially palindromic in base 6.

It can be written as a sum of positive squares in 4 ways, for example, as 579121 + 2433600 = 761^2 + 1560^2 .

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 3012721 - 2¹ = 3012719 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3012695 and 3012704.

It is not an unprimeable number, because it can be changed into a prime (3012727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7891 + ... + 8263.

It is an arithmetic number, because the mean of its divisors is an integer number (388773).

Almost surely, 2^3012721 is an apocalyptic number.

It is an amenable number.

3012721 is a deficient number, since it is larger than the sum of its proper divisors (97463).

3012721 is a wasteful number, since it uses less digits than its factorization.

3012721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 3012721 is about 1735.7191593112. The cubic root of 3012721 is about 144.4285235356.

Adding to 3012721 its reverse (1272103), we get a palindrome (4284824).

The spelling of 3012721 in words is "three million, twelve thousand, seven hundred twenty-one".