825647 has 2 divisors, whose sum is σ = 825648. Its totient is φ = 825646.

The previous prime is 825637. The next prime is 825661. The reversal of 825647 is 746528.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 825647 - 2¹² = 821551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (825637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412823 + 412824.

It is an arithmetic number, because the mean of its divisors is an integer number (412824).

2⁸²⁵⁶⁴⁷ is an apocalyptic number.

825647 is a deficient number, since it is larger than the sum of its proper divisors (1).

825647 is an equidigital number, since it uses as much as digits as its factorization.

825647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 32.

The square root of 825647 is about 908.6511982053. The cubic root of 825647 is about 93.8133840995.

The spelling of 825647 in words is "eight hundred twenty-five thousand, six hundred forty-seven".