6435421 has 4 divisors (see below), whose sum is σ = 6451200. Its totient is φ = 6419644.

The previous prime is 6435413. The next prime is 6435431. The reversal of 6435421 is 1245346.

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 6435421 - 2³ = 6435413 is a prime.

It is a Duffinian number.

6435421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6435431) 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, 7261 + ... + 8098.

It is an arithmetic number, because the mean of its divisors is an integer number (1612800).

Almost surely, 2^6435421 is an apocalyptic number.

It is an amenable number.

6435421 is a deficient number, since it is larger than the sum of its proper divisors (15779).

6435421 is a wasteful number, since it uses less digits than its factorization.

6435421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15778.

The product of its digits is 2880, while the sum is 25.

The square root of 6435421 is about 2536.8131582756. The cubic root of 6435421 is about 186.0054436299.

The spelling of 6435421 in words is "six million, four hundred thirty-five thousand, four hundred twenty-one".