3021729 has 4 divisors (see below), whose sum is σ = 4028976. Its totient is φ = 2014484.

The previous prime is 3021727. The next prime is 3021737. The reversal of 3021729 is 9271203.

3021729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3021729 - 2¹ = 3021727 is a prime.

It is a super-2 number, since 2×3021729² = 18261692298882, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3021699 and 3021708.

It is not an unprimeable number, because it can be changed into a prime (3021727) 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, 503619 + ... + 503624.

It is an arithmetic number, because the mean of its divisors is an integer number (1007244).

Almost surely, 2^3021729 is an apocalyptic number.

It is an amenable number.

3021729 is a deficient number, since it is larger than the sum of its proper divisors (1007247).

3021729 is a wasteful number, since it uses less digits than its factorization.

3021729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007246.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 3021729 is about 1738.3121123665. The cubic root of 3021729 is about 144.5723268305.

The spelling of 3021729 in words is "three million, twenty-one thousand, seven hundred twenty-nine".