3748621 has 4 divisors (see below), whose sum is σ = 3757600. Its totient is φ = 3739644.

The previous prime is 3748607. The next prime is 3748651. The reversal of 3748621 is 1268473.

3748621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3748621 - 2¹⁵ = 3715853 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 (3748651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3831 + ... + 4708.

It is an arithmetic number, because the mean of its divisors is an integer number (939400).

Almost surely, 2^3748621 is an apocalyptic number.

It is an amenable number.

3748621 is a deficient number, since it is larger than the sum of its proper divisors (8979).

3748621 is an equidigital number, since it uses as much as digits as its factorization.

3748621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8978.

The product of its digits is 8064, while the sum is 31.

The square root of 3748621 is about 1936.1355840953. The cubic root of 3748621 is about 155.3425790801.

The spelling of 3748621 in words is "three million, seven hundred forty-eight thousand, six hundred twenty-one".