3784021 has 8 divisors (see below), whose sum is σ = 4035200. Its totient is φ = 3538080.

The previous prime is 3784019. The next prime is 3784037. The reversal of 3784021 is 1204873.

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 3784021 - 2¹ = 3784019 is a prime.

It is a Duffinian number.

3784021 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3784051) 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, 241 + ... + 2761.

It is an arithmetic number, because the mean of its divisors is an integer number (504400).

Almost surely, 2^3784021 is an apocalyptic number.

It is an amenable number.

3784021 is a deficient number, since it is larger than the sum of its proper divisors (251179).

3784021 is a wasteful number, since it uses less digits than its factorization.

3784021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2619.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 3784021 is about 1945.2560242806. The cubic root of 3784021 is about 155.8300389808.

Adding to 3784021 its reverse (1204873), we get a palindrome (4988894).

The spelling of 3784021 in words is "three million, seven hundred eighty-four thousand, twenty-one".