825286405 has 4 divisors (see below), whose sum is σ = 990343692. Its totient is φ = 660229120.

The previous prime is 825286339. The next prime is 825286411. The reversal of 825286405 is 504682528.

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 455993316 + 369293089 = 21354^2 + 19217^2 .

It is not a de Polignac number, because 825286405 - 2¹¹ = 825284357 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82528636 + ... + 82528645.

It is an arithmetic number, because the mean of its divisors is an integer number (247585923).

Almost surely, 2^825286405 is an apocalyptic number.

It is an amenable number.

825286405 is a deficient number, since it is larger than the sum of its proper divisors (165057287).

825286405 is a wasteful number, since it uses less digits than its factorization.

825286405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165057286.

The product of its (nonzero) digits is 153600, while the sum is 40.

The square root of 825286405 is about 28727.7984711673. The cubic root of 825286405 is about 937.9972468523.

The spelling of 825286405 in words is "eight hundred twenty-five million, two hundred eighty-six thousand, four hundred five".