3242721 has 4 divisors (see below), whose sum is σ = 4323632. Its totient is φ = 2161812.

The previous prime is 3242689. The next prime is 3242741. The reversal of 3242721 is 1272423.

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 not a de Polignac number, because 3242721 - 2⁵ = 3242689 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3242741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540451 + ... + 540456.

It is an arithmetic number, because the mean of its divisors is an integer number (1080908).

Almost surely, 2^3242721 is an apocalyptic number.

It is an amenable number.

3242721 is a deficient number, since it is larger than the sum of its proper divisors (1080911).

3242721 is a wasteful number, since it uses less digits than its factorization.

3242721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080910.

The product of its digits is 672, while the sum is 21.

The square root of 3242721 is about 1800.7556747099. The cubic root of 3242721 is about 148.0141360980.

The spelling of 3242721 in words is "three million, two hundred forty-two thousand, seven hundred twenty-one".