6420459 has 16 divisors (see below), whose sum is σ = 8895744. Its totient is φ = 4116000.

The previous prime is 6420457. The next prime is 6420467. The reversal of 6420459 is 9540246.

It is not a de Polignac number, because 6420459 - 2¹ = 6420457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6420451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8809 + ... + 9509.

It is an arithmetic number, because the mean of its divisors is an integer number (555984).

Almost surely, 2^6420459 is an apocalyptic number.

6420459 is a deficient number, since it is larger than the sum of its proper divisors (2475285).

6420459 is a wasteful number, since it uses less digits than its factorization.

6420459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 6420459 is about 2533.8624666702. The cubic root of 6420459 is about 185.8611809613.

The spelling of 6420459 in words is "six million, four hundred twenty thousand, four hundred fifty-nine".