6400025 has 12 divisors (see below), whose sum is σ = 8072400. Its totient is φ = 5032080.

The previous prime is 6400019. The next prime is 6400033. The reversal of 6400025 is 5200046.

It is not a de Polignac number, because 6400025 - 2⁶ = 6399961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6399976 and 6400012.

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, 695 + ... + 3644.

It is an arithmetic number, because the mean of its divisors is an integer number (672700).

Almost surely, 2^6400025 is an apocalyptic number.

It is an amenable number.

6400025 is a deficient number, since it is larger than the sum of its proper divisors (1672375).

6400025 is a wasteful number, since it uses less digits than its factorization.

6400025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4408 (or 4403 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 6400025 is about 2529.8270691887. The cubic root of 6400025 is about 185.6637950936.

The spelling of 6400025 in words is "six million, four hundred thousand, twenty-five".