3042721 has 8 divisors (see below), whose sum is σ = 3341664. Its totient is φ = 2747520.

The previous prime is 3042719. The next prime is 3042731. The reversal of 3042721 is 1272403.

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 3042721 - 2¹ = 3042719 is a prime.

It is a Duffinian number.

3042721 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3042701) 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, 945 + ... + 2641.

It is an arithmetic number, because the mean of its divisors is an integer number (417708).

Almost surely, 2^3042721 is an apocalyptic number.

It is an amenable number.

3042721 is a deficient number, since it is larger than the sum of its proper divisors (298943).

3042721 is a wasteful number, since it uses less digits than its factorization.

3042721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1871.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 3042721 is about 1744.3397031542. The cubic root of 3042721 is about 144.9063366571.

It can be divided in two parts, 304 and 2721, that added together give a square (3025 = 55²).

The spelling of 3042721 in words is "three million, forty-two thousand, seven hundred twenty-one".