6405057 has 12 divisors (see below), whose sum is σ = 9293284. Its totient is φ = 4250880.

The previous prime is 6405053. The next prime is 6405059. The reversal of 6405057 is 7505046.

6405057 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5022081 + 1382976 = 2241^2 + 1176^2 .

It is not a de Polignac number, because 6405057 - 2² = 6405053 is a prime.

It is a Duffinian number.

6405057 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6405057.

It is not an unprimeable number, because it can be changed into a prime (6405053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 693 + ... + 3645.

Almost surely, 2^6405057 is an apocalyptic number.

It is an amenable number.

6405057 is a deficient number, since it is larger than the sum of its proper divisors (2888227).

6405057 is a wasteful number, since it uses less digits than its factorization.

6405057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3200 (or 3197 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 6405057 is about 2530.8214081598. The cubic root of 6405057 is about 185.7124415427.

It can be divided in two parts, 6 and 405057, that multiplied together give a palindrome (2430342).

The spelling of 6405057 in words is "six million, four hundred five thousand, fifty-seven".