825719 has 4 divisors (see below), whose sum is σ = 833544. Its totient is φ = 817896.

The previous prime is 825709. The next prime is 825733. The reversal of 825719 is 917528.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 825719 - 2¹⁶ = 760183 is a prime.

It is a super-2 number, since 2×825719² = 1363623733922, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3752 + ... + 3965.

It is an arithmetic number, because the mean of its divisors is an integer number (208386).

2⁸²⁵⁷¹⁹ is an apocalyptic number.

825719 is a deficient number, since it is larger than the sum of its proper divisors (7825).

825719 is a wasteful number, since it uses less digits than its factorization.

825719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7824.

The product of its digits is 5040, while the sum is 32.

The square root of 825719 is about 908.6908165047. The cubic root of 825719 is about 93.8161109983.

Subtracting 825719 from its reverse (917528), we obtain a square (91809 = 303²).

The spelling of 825719 in words is "eight hundred twenty-five thousand, seven hundred nineteen".