6406625 has 16 divisors (see below), whose sum is σ = 8087040. Its totient is φ = 5066800.

The previous prime is 6406601. The next prime is 6406639. The reversal of 6406625 is 5266046.

It is not a de Polignac number, because 6406625 - 2⁸ = 6406369 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13136 + ... + 13614.

It is an arithmetic number, because the mean of its divisors is an integer number (505440).

Almost surely, 2^6406625 is an apocalyptic number.

It is an amenable number.

6406625 is a deficient number, since it is larger than the sum of its proper divisors (1680415).

6406625 is a wasteful number, since it uses less digits than its factorization.

6406625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601 (or 591 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 6406625 is about 2531.1311700503. The cubic root of 6406625 is about 185.7275948478.

The spelling of 6406625 in words is "six million, four hundred six thousand, six hundred twenty-five".