6406925 has 24 divisors (see below), whose sum is σ = 9380352. Its totient is φ = 4248000.

The previous prime is 6406919. The next prime is 6406931. The reversal of 6406925 is 5296046.

It is an interprime number because it is at equal distance from previous prime (6406919) and next prime (6406931).

It is not a de Polignac number, because 6406925 - 2⁶ = 6406861 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6406891 and 6406900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4835 + ... + 6015.

It is an arithmetic number, because the mean of its divisors is an integer number (390848).

Almost surely, 2^6406925 is an apocalyptic number.

It is an amenable number.

6406925 is a deficient number, since it is larger than the sum of its proper divisors (2973427).

6406925 is a wasteful number, since it uses less digits than its factorization.

6406925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229 (or 1224 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 6406925 is about 2531.1904313978. The cubic root of 6406925 is about 185.7304937953.

The spelling of 6406925 in words is "six million, four hundred six thousand, nine hundred twenty-five".