3864421 has 4 divisors (see below), whose sum is σ = 4215744. Its totient is φ = 3513100.

The previous prime is 3864409. The next prime is 3864433. The reversal of 3864421 is 1244683.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1244683 = 11 ⋅113153.

It is an interprime number because it is at equal distance from previous prime (3864409) and next prime (3864433).

It is a cyclic number.

It is not a de Polignac number, because 3864421 - 2¹¹ = 3862373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3864421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3864451) 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, 175645 + ... + 175666.

It is an arithmetic number, because the mean of its divisors is an integer number (1053936).

Almost surely, 2^3864421 is an apocalyptic number.

It is an amenable number.

3864421 is a deficient number, since it is larger than the sum of its proper divisors (351323).

3864421 is a wasteful number, since it uses less digits than its factorization.

3864421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351322.

The product of its digits is 4608, while the sum is 28.

The square root of 3864421 is about 1965.8130633405. The cubic root of 3864421 is about 156.9259661494.

The spelling of 3864421 in words is "three million, eight hundred sixty-four thousand, four hundred twenty-one".