825457 has 4 divisors (see below), whose sum is σ = 833140. Its totient is φ = 817776.

The previous prime is 825443. The next prime is 825467. The reversal of 825457 is 754528.

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

It can be written as a sum of positive squares in 2 ways, for example, as 746496 + 78961 = 864^2 + 281^2 .

It is a cyclic number.

It is not a de Polignac number, because 825457 - 2⁷ = 825329 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 8³ + 2⁷ + 4⁵ + 5³ + 5³ + 7⁷ .

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (825467) 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, 3678 + ... + 3895.

It is an arithmetic number, because the mean of its divisors is an integer number (208285).

2⁸²⁵⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

825457 is a deficient number, since it is larger than the sum of its proper divisors (7683).

825457 is a wasteful number, since it uses less digits than its factorization.

825457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7682.

The product of its digits is 11200, while the sum is 31.

The square root of 825457 is about 908.5466416206. The cubic root of 825457 is about 93.8061873554.

The spelling of 825457 in words is "eight hundred twenty-five thousand, four hundred fifty-seven".