800242521 has 16 divisors (see below), whose sum is σ = 1161982080. Its totient is φ = 486921600.

The previous prime is 800242517. The next prime is 800242523. The reversal of 800242521 is 125242008.

It is not a de Polignac number, because 800242521 - 2² = 800242517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 800242491 and 800242500.

It is not an unprimeable number, because it can be changed into a prime (800242523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111805 + ... + 118746.

It is an arithmetic number, because the mean of its divisors is an integer number (72623880).

Almost surely, 2^800242521 is an apocalyptic number.

It is an amenable number.

800242521 is a deficient number, since it is larger than the sum of its proper divisors (361739559).

800242521 is a wasteful number, since it uses less digits than its factorization.

800242521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230656.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 800242521 is about 28288.5581286852. The cubic root of 800242521 is about 928.4115641421.

Adding to 800242521 its reverse (125242008), we get a palindrome (925484529).

The spelling of 800242521 in words is "eight hundred million, two hundred forty-two thousand, five hundred twenty-one".