3768421 has 4 divisors (see below), whose sum is σ = 3782700. Its totient is φ = 3754144.

The previous prime is 3768409. The next prime is 3768431. The reversal of 3768421 is 1248673.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1476225 + 2292196 = 1215^2 + 1514^2 .

It is a cyclic number.

It is not a de Polignac number, because 3768421 - 2¹⁵ = 3735653 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3768431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6736 + ... + 7273.

It is an arithmetic number, because the mean of its divisors is an integer number (945675).

Almost surely, 2^3768421 is an apocalyptic number.

It is an amenable number.

3768421 is a deficient number, since it is larger than the sum of its proper divisors (14279).

3768421 is a wasteful number, since it uses less digits than its factorization.

3768421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14278.

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

The square root of 3768421 is about 1941.2421281231. The cubic root of 3768421 is about 155.6156024604.

The spelling of 3768421 in words is "three million, seven hundred sixty-eight thousand, four hundred twenty-one".