6420425 has 24 divisors (see below), whose sum is σ = 8933952. Its totient is φ = 4536000.

The previous prime is 6420413. The next prime is 6420431. The reversal of 6420425 is 5240246.

It is not a de Polignac number, because 6420425 - 2¹² = 6416329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6420425.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9860 + ... + 10490.

It is an arithmetic number, because the mean of its divisors is an integer number (372248).

Almost surely, 2^6420425 is an apocalyptic number.

It is an amenable number.

6420425 is a deficient number, since it is larger than the sum of its proper divisors (2513527).

6420425 is a wasteful number, since it uses less digits than its factorization.

6420425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689 (or 684 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 6420425 is about 2533.8557575363. The cubic root of 6420425 is about 185.8608528803.

The spelling of 6420425 in words is "six million, four hundred twenty thousand, four hundred twenty-five".