3750421 has 4 divisors (see below), whose sum is σ = 3971052. Its totient is φ = 3529792.

The previous prime is 3750419. The next prime is 3750443. The reversal of 3750421 is 1240573.

3750421 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 an emirpimes, since its reverse is a distinct semiprime: 1240573 = 37 ⋅33529.

It can be written as a sum of positive squares in 2 ways, for example, as 2402500 + 1347921 = 1550^2 + 1161^2 .

It is a cyclic number.

It is not a de Polignac number, because 3750421 - 2¹ = 3750419 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3750392 and 3750401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3750451) 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, 110290 + ... + 110323.

It is an arithmetic number, because the mean of its divisors is an integer number (992763).

Almost surely, 2^3750421 is an apocalyptic number.

It is an amenable number.

3750421 is a deficient number, since it is larger than the sum of its proper divisors (220631).

3750421 is a wasteful number, since it uses less digits than its factorization.

3750421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220630.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 3750421 is about 1936.6003717856. The cubic root of 3750421 is about 155.3674390574.

Adding to 3750421 its reverse (1240573), we get a palindrome (4990994).

The spelling of 3750421 in words is "three million, seven hundred fifty thousand, four hundred twenty-one".