3764221 has 4 divisors (see below), whose sum is σ = 3769792. Its totient is φ = 3758652.

The previous prime is 3764213. The next prime is 3764227. The reversal of 3764221 is 1224673.

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 3764221 - 2³ = 3764213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3764227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1605 + ... + 3178.

It is an arithmetic number, because the mean of its divisors is an integer number (942448).

Almost surely, 2^3764221 is an apocalyptic number.

It is an amenable number.

3764221 is a deficient number, since it is larger than the sum of its proper divisors (5571).

3764221 is an equidigital number, since it uses as much as digits as its factorization.

3764221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5570.

The product of its digits is 2016, while the sum is 25.

The square root of 3764221 is about 1940.1600449447. The cubic root of 3764221 is about 155.5577684681.

Adding to 3764221 its reverse (1224673), we get a palindrome (4988894).

The spelling of 3764221 in words is "three million, seven hundred sixty-four thousand, two hundred twenty-one".