821041045 has 16 divisors (see below), whose sum is σ = 1109491200. Its totient is φ = 577857600.

The previous prime is 821041021. The next prime is 821041049. The reversal of 821041045 is 540140128.

It is not a de Polignac number, because 821041045 - 2¹¹ = 821038997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821041049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239070 + ... + 242479.

It is an arithmetic number, because the mean of its divisors is an integer number (69343200).

Almost surely, 2^821041045 is an apocalyptic number.

It is an amenable number.

821041045 is a deficient number, since it is larger than the sum of its proper divisors (288450155).

821041045 is a wasteful number, since it uses less digits than its factorization.

821041045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481596.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 821041045 is about 28653.8137950256. The cubic root of 821041045 is about 936.3860955704.

The spelling of 821041045 in words is "eight hundred twenty-one million, forty-one thousand, forty-five".