826857225 has 18 divisors (see below), whose sum is σ = 1480993566. Its totient is φ = 440990400.

The previous prime is 826857223. The next prime is 826857281. The reversal of 826857225 is 522758628.

It can be written as a sum of positive squares in 3 ways, for example, as 126090441 + 700766784 = 11229^2 + 26472^2 .

It is not a de Polignac number, because 826857225 - 2¹ = 826857223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (826857223) 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 in 17 ways as a sum of consecutive naturals, for example, 1837236 + ... + 1837685.

Almost surely, 2^826857225 is an apocalyptic number.

It is an amenable number.

826857225 is a deficient number, since it is larger than the sum of its proper divisors (654136341).

826857225 is a wasteful number, since it uses less digits than its factorization.

826857225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3674937 (or 3674929 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 826857225 is about 28755.1251953456. The cubic root of 826857225 is about 938.5919862433.

The spelling of 826857225 in words is "eight hundred twenty-six million, eight hundred fifty-seven thousand, two hundred twenty-five".