821297260 has 48 divisors (see below), whose sum is σ = 2034708480. Its totient is φ = 272502720.

The previous prime is 821297227. The next prime is 821297261. The reversal of 821297260 is 62792128.

821297260 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (821297261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90280 + ... + 98959.

It is an arithmetic number, because the mean of its divisors is an integer number (42389760).

Almost surely, 2^821297260 is an apocalyptic number.

It is an amenable number.

821297260 is an abundant number, since it is smaller than the sum of its proper divisors (1213411220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

821297260 is a wasteful number, since it uses less digits than its factorization.

821297260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189286 (or 189284 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 821297260 is about 28658.2843171045. The cubic root of 821297260 is about 936.4834886760.

The spelling of 821297260 in words is "eight hundred twenty-one million, two hundred ninety-seven thousand, two hundred sixty".