6403257 has 48 divisors (see below), whose sum is σ = 11286912. Its totient is φ = 3421440.

The previous prime is 6403219. The next prime is 6403273. The reversal of 6403257 is 7523046.

It is a happy number.

6403257 is a `hidden beast` number, since 6 + 403 + 257 = 666.

It is not a de Polignac number, because 6403257 - 2⁶ = 6403193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6403257.

It is not an unprimeable number, because it can be changed into a prime (6403297) 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, 95538 + ... + 95604.

It is an arithmetic number, because the mean of its divisors is an integer number (235144).

Almost surely, 2^6403257 is an apocalyptic number.

6403257 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

6403257 is a deficient number, since it is larger than the sum of its proper divisors (4883655).

6403257 is a wasteful number, since it uses less digits than its factorization.

6403257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 155 counting only the distinct ones).

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

The square root of 6403257 is about 2530.4657674033. The cubic root of 6403257 is about 185.6950431176.

The spelling of 6403257 in words is "six million, four hundred three thousand, two hundred fifty-seven".