3787221 has 8 divisors (see below), whose sum is σ = 5145120. Its totient is φ = 2477072.

The previous prime is 3787219. The next prime is 3787229. The reversal of 3787221 is 1227873.

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 3787221 - 2¹ = 3787219 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3787229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11751 + ... + 12068.

It is an arithmetic number, because the mean of its divisors is an integer number (643140).

Almost surely, 2^3787221 is an apocalyptic number.

It is an amenable number.

3787221 is a deficient number, since it is larger than the sum of its proper divisors (1357899).

3787221 is a wasteful number, since it uses less digits than its factorization.

3787221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23875.

The product of its digits is 4704, while the sum is 30.

The square root of 3787221 is about 1946.0783643009. The cubic root of 3787221 is about 155.8739530805.

The spelling of 3787221 in words is "three million, seven hundred eighty-seven thousand, two hundred twenty-one".