6406825 has 12 divisors (see below), whose sum is σ = 8219340. Its totient is φ = 4948160.

The previous prime is 6406823. The next prime is 6406831. The reversal of 6406825 is 5286046.

It can be written as a sum of positive squares in 6 ways, for example, as 399424 + 6007401 = 632^2 + 2451^2 .

It is not a de Polignac number, because 6406825 - 2¹ = 6406823 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6406823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3694 + ... + 5143.

It is an arithmetic number, because the mean of its divisors is an integer number (684945).

Almost surely, 2^6406825 is an apocalyptic number.

It is an amenable number.

6406825 is a deficient number, since it is larger than the sum of its proper divisors (1812515).

6406825 is a wasteful number, since it uses less digits than its factorization.

6406825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8876 (or 8871 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 6406825 is about 2531.1706777695. The cubic root of 6406825 is about 185.7295274895.

The spelling of 6406825 in words is "six million, four hundred six thousand, eight hundred twenty-five".