6392421 has 12 divisors (see below), whose sum is σ = 10552672. Its totient is φ = 3652776.

The previous prime is 6392401. The next prime is 6392429. The reversal of 6392421 is 1242936.

6392421 is a `hidden beast` number, since 639 + 2 + 4 + 21 = 666.

It is not a de Polignac number, because 6392421 - 2⁵ = 6392389 is a prime.

It is a d-powerful number, because it can be written as 6⁶ + 3¹³ + 9² + 2¹⁵ + 4¹¹ + 2¹⁹ + 1 .

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6392429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50671 + ... + 50796.

Almost surely, 2^6392421 is an apocalyptic number.

It is an amenable number.

6392421 is a deficient number, since it is larger than the sum of its proper divisors (4160251).

6392421 is a wasteful number, since it uses less digits than its factorization.

6392421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101480 (or 101477 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 6392421 is about 2528.3237530032. The cubic root of 6392421 is about 185.5902356418.

The spelling of 6392421 in words is "six million, three hundred ninety-two thousand, four hundred twenty-one".