6409925 has 12 divisors (see below), whose sum is σ = 8022180. Its totient is φ = 5080320.

The previous prime is 6409913. The next prime is 6409933. The reversal of 6409925 is 5299046.

It can be written as a sum of positive squares in 6 ways, for example, as 3020644 + 3389281 = 1738^2 + 1841^2 .

It is not a de Polignac number, because 6409925 - 2¹⁰ = 6408901 is a prime.

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, 1691 + ... + 3959.

It is an arithmetic number, because the mean of its divisors is an integer number (668515).

Almost surely, 2^6409925 is an apocalyptic number.

It is an amenable number.

6409925 is a deficient number, since it is larger than the sum of its proper divisors (1612255).

6409925 is a wasteful number, since it uses less digits than its factorization.

6409925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392 (or 2387 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 6409925 is about 2531.7829685816. The cubic root of 6409925 is about 185.7594782945.

The spelling of 6409925 in words is "six million, four hundred nine thousand, nine hundred twenty-five".