825247 has 2 divisors, whose sum is σ = 825248. Its totient is φ = 825246.

The previous prime is 825241. The next prime is 825259. The reversal of 825247 is 742528.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 825247 - 2¹⁵ = 792479 is a prime.

It is a super-2 number, since 2×825247² = 1362065222018, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (825241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412623 + 412624.

It is an arithmetic number, because the mean of its divisors is an integer number (412624).

2⁸²⁵²⁴⁷ is an apocalyptic number.

825247 is a deficient number, since it is larger than the sum of its proper divisors (1).

825247 is an equidigital number, since it uses as much as digits as its factorization.

825247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4480, while the sum is 28.

The square root of 825247 is about 908.4310650787. The cubic root of 825247 is about 93.7982317744.

It can be divided in two parts, 82 and 5247, that added together give a square (5329 = 73²).

The spelling of 825247 in words is "eight hundred twenty-five thousand, two hundred forty-seven".