6390225 has 24 divisors (see below), whose sum is σ = 11740320. Its totient is φ = 3407760.

The previous prime is 6390211. The next prime is 6390227. The reversal of 6390225 is 5220936.

6390225 is a `hidden beast` number, since 639 + 0 + 2 + 25 = 666.

It is not a de Polignac number, because 6390225 - 2⁶ = 6390161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6390227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4059 + ... + 5408.

It is an arithmetic number, because the mean of its divisors is an integer number (489180).

Almost surely, 2^6390225 is an apocalyptic number.

It is an amenable number.

6390225 is a deficient number, since it is larger than the sum of its proper divisors (5350095).

6390225 is a wasteful number, since it uses less digits than its factorization.

6390225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9486 (or 9475 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 6390225 is about 2527.8894358733. The cubic root of 6390225 is about 185.5689811575.

The spelling of 6390225 in words is "six million, three hundred ninety thousand, two hundred twenty-five".