804961521 has 96 divisors (see below), whose sum is σ = 1508462592. Its totient is φ = 402019200.

The previous prime is 804961519. The next prime is 804961559. The reversal of 804961521 is 125169408.

It is not a de Polignac number, because 804961521 - 2¹ = 804961519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (804961571) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2844246 + ... + 2844528.

It is an arithmetic number, because the mean of its divisors is an integer number (15713152).

Almost surely, 2^804961521 is an apocalyptic number.

It is an amenable number.

804961521 is a deficient number, since it is larger than the sum of its proper divisors (703501071).

804961521 is a wasteful number, since it uses less digits than its factorization.

804961521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 804961521 is about 28371.8438068448. The cubic root of 804961521 is about 930.2329246614.

The spelling of 804961521 in words is "eight hundred four million, nine hundred sixty-one thousand, five hundred twenty-one".