6420743 has 8 divisors (see below), whose sum is σ = 7441920. Its totient is φ = 5425560.

The previous prime is 6420737. The next prime is 6420763. The reversal of 6420743 is 3470246.

It is a happy number.

6420743 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 6420743 - 2⁸ = 6420487 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 (6420763) 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, 5963 + ... + 6956.

It is an arithmetic number, because the mean of its divisors is an integer number (930240).

Almost surely, 2^6420743 is an apocalyptic number.

6420743 is a deficient number, since it is larger than the sum of its proper divisors (1021177).

6420743 is a wasteful number, since it uses less digits than its factorization.

6420743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12997.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 6420743 is about 2533.9185069769. The cubic root of 6420743 is about 185.8639213571.

Adding to 6420743 its reverse (3470246), we get a palindrome (9890989).

The spelling of 6420743 in words is "six million, four hundred twenty thousand, seven hundred forty-three".