6420525 has 12 divisors (see below), whose sum is σ = 10615392. Its totient is φ = 3424240.

The previous prime is 6420523. The next prime is 6420587. The reversal of 6420525 is 5250246.

6420525 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6420525 - 2¹ = 6420523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6420495 and 6420504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420523) 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, 42729 + ... + 42878.

It is an arithmetic number, because the mean of its divisors is an integer number (884616).

Almost surely, 2^6420525 is an apocalyptic number.

It is an amenable number.

6420525 is a deficient number, since it is larger than the sum of its proper divisors (4194867).

6420525 is a wasteful number, since it uses less digits than its factorization.

6420525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85620 (or 85615 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 6420525 is about 2533.8754902323. The cubic root of 6420525 is about 185.8618178210.

The spelling of 6420525 in words is "six million, four hundred twenty thousand, five hundred twenty-five".