6420375 has 48 divisors (see below), whose sum is σ = 12492480. Its totient is φ = 3153600.

The previous prime is 6420353. The next prime is 6420377. The reversal of 6420375 is 5730246.

It is a happy number.

It is not a de Polignac number, because 6420375 - 2⁵ = 6420343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420377) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14406 + ... + 14844.

It is an arithmetic number, because the mean of its divisors is an integer number (260260).

Almost surely, 2^6420375 is an apocalyptic number.

6420375 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6420375 is a deficient number, since it is larger than the sum of its proper divisors (6072105).

6420375 is a wasteful number, since it uses less digits than its factorization.

6420375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473 (or 460 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 6420375 is about 2533.8458911307. The cubic root of 6420375 is about 185.8603704062.

The spelling of 6420375 in words is "six million, four hundred twenty thousand, three hundred seventy-five".