3268721 has 4 divisors (see below), whose sum is σ = 3313572. Its totient is φ = 3223872.

The previous prime is 3268711. The next prime is 3268723. The reversal of 3268721 is 1278623.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2689600 + 579121 = 1640^2 + 761^2 .

It is a cyclic number.

It is not a de Polignac number, because 3268721 - 2¹⁰ = 3267697 is a prime.

It is a Duffinian number.

It is a zygodrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (3268723) 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, 22316 + ... + 22461.

It is an arithmetic number, because the mean of its divisors is an integer number (828393).

Almost surely, 2^3268721 is an apocalyptic number.

It is an amenable number.

3268721 is a deficient number, since it is larger than the sum of its proper divisors (44851).

3268721 is an equidigital number, since it uses as much as digits as its factorization.

3268721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44850.

The product of its digits is 4032, while the sum is 29.

The square root of 3268721 is about 1807.9604531073. The cubic root of 3268721 is about 148.4086738706.

The spelling of 3268721 in words is "three million, two hundred sixty-eight thousand, seven hundred twenty-one".