6420275 has 12 divisors (see below), whose sum is σ = 8082072. Its totient is φ = 5058240.

The previous prime is 6420259. The next prime is 6420307. The reversal of 6420275 is 5720246.

It is not a de Polignac number, because 6420275 - 2⁴ = 6420259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 242 + ... + 3591.

It is an arithmetic number, because the mean of its divisors is an integer number (673506).

Almost surely, 2^6420275 is an apocalyptic number.

6420275 is a deficient number, since it is larger than the sum of its proper divisors (1661797).

6420275 is a wasteful number, since it uses less digits than its factorization.

6420275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3910 (or 3905 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 6420275 is about 2533.8261582042. The cubic root of 6420275 is about 185.8594054504.

The spelling of 6420275 in words is "six million, four hundred twenty thousand, two hundred seventy-five".