6400242421 has 8 divisors (see below), whose sum is σ = 6550768224. Its totient is φ = 6249793200.

The previous prime is 6400242413. The next prime is 6400242439. The reversal of 6400242421 is 1242420046.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6400242421 - 2³ = 6400242413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6400242461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172146 + ... + 205996.

It is an arithmetic number, because the mean of its divisors is an integer number (818846028).

Almost surely, 2^6400242421 is an apocalyptic number.

It is an amenable number.

6400242421 is a deficient number, since it is larger than the sum of its proper divisors (150525803).

6400242421 is a wasteful number, since it uses less digits than its factorization.

6400242421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38291.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 6400242421 is about 80001.5151169026. The cubic root of 6400242421 is about 1856.6589752034.

Adding to 6400242421 its reverse (1242420046), we get a palindrome (7642662467).

The spelling of 6400242421 in words is "six billion, four hundred million, two hundred forty-two thousand, four hundred twenty-one".