3748821 has 8 divisors (see below), whose sum is σ = 5017344. Its totient is φ = 2489760.

The previous prime is 3748819. The next prime is 3748831. The reversal of 3748821 is 1288473.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3748821 - 2¹ = 3748819 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3748831) 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, 1381 + ... + 3066.

It is an arithmetic number, because the mean of its divisors is an integer number (627168).

Almost surely, 2^3748821 is an apocalyptic number.

It is an amenable number.

3748821 is a deficient number, since it is larger than the sum of its proper divisors (1268523).

3748821 is a wasteful number, since it uses less digits than its factorization.

3748821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4731.

The product of its digits is 10752, while the sum is 33.

The square root of 3748821 is about 1936.1872326818. The cubic root of 3748821 is about 155.3453416927.

Adding to 3748821 its product of digits (10752), we get a palindrome (3759573).

The spelling of 3748821 in words is "three million, seven hundred forty-eight thousand, eight hundred twenty-one".