825204521 has 8 divisors (see below), whose sum is σ = 847426944. Its totient is φ = 803176560.

The previous prime is 825204493. The next prime is 825204539. The reversal of 825204521 is 125402528.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 825204521 - 2¹⁴ = 825188137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (825200521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39995 + ... + 57008.

It is an arithmetic number, because the mean of its divisors is an integer number (105928368).

Almost surely, 2^825204521 is an apocalyptic number.

It is an amenable number.

825204521 is a deficient number, since it is larger than the sum of its proper divisors (22222423).

825204521 is a wasteful number, since it uses less digits than its factorization.

825204521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97231.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 825204521 is about 28726.3732656944. The cubic root of 825204521 is about 937.9662234781.

The spelling of 825204521 in words is "eight hundred twenty-five million, two hundred four thousand, five hundred twenty-one".