6391425 has 24 divisors (see below), whose sum is σ = 10912000. Its totient is φ = 3297600.

The previous prime is 6391421. The next prime is 6391453. The reversal of 6391425 is 5241936.

It is not a de Polignac number, because 6391425 - 2² = 6391421 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6391392 and 6391401.

It is not an unprimeable number, because it can be changed into a prime (6391421) 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, 951 + ... + 3699.

Almost surely, 2^6391425 is an apocalyptic number.

It is an amenable number.

6391425 is a deficient number, since it is larger than the sum of its proper divisors (4520575).

6391425 is a wasteful number, since it uses less digits than its factorization.

6391425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2793 (or 2788 counting only the distinct ones).

The product of its digits is 6480, while the sum is 30.

The square root of 6391425 is about 2528.1267768844. The cubic root of 6391425 is about 185.5805962331.

It can be divided in two parts, 639 and 1425, that multiplied together give a triangular number (910575 = T₁₃₄₉).

The spelling of 6391425 in words is "six million, three hundred ninety-one thousand, four hundred twenty-five".