6403525 has 12 divisors (see below), whose sum is σ = 8060992. Its totient is φ = 5045040.

The previous prime is 6403511. The next prime is 6403571. The reversal of 6403525 is 5253046.

It is not a de Polignac number, because 6403525 - 2⁵ = 6403493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a d-powerful number, because it can be written as 6⁶ + 4¹¹ + 0 + 3⁵ + 5⁷ + 2¹⁷ + 5⁹ .

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 6403525.

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, 237 + ... + 3586.

Almost surely, 2^6403525 is an apocalyptic number.

It is an amenable number.

6403525 is a deficient number, since it is larger than the sum of its proper divisors (1657467).

6403525 is a wasteful number, since it uses less digits than its factorization.

6403525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3900 (or 3895 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 6403525 is about 2530.5187215273. The cubic root of 6403525 is about 185.6976337563.

The spelling of 6403525 in words is "six million, four hundred three thousand, five hundred twenty-five".