8042774521 has 8 divisors (see below), whose sum is σ = 8066436840. Its totient is φ = 8019136512.

The previous prime is 8042774483. The next prime is 8042774549. The reversal of 8042774521 is 1254772408.

It can be written as a sum of positive squares in 4 ways, for example, as 235284921 + 7807489600 = 15339^2 + 88360^2 .

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 8042774521 - 2⁷ = 8042774393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8042774581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 813021 + ... + 822853.

It is an arithmetic number, because the mean of its divisors is an integer number (1008304605).

Almost surely, 2^8042774521 is an apocalyptic number.

It is an amenable number.

8042774521 is a deficient number, since it is larger than the sum of its proper divisors (23662319).

8042774521 is a wasteful number, since it uses less digits than its factorization.

8042774521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12155.

The product of its (nonzero) digits is 125440, while the sum is 40.

The square root of 8042774521 is about 89681.5171649097. The cubic root of 8042774521 is about 2003.5582092360.

The spelling of 8042774521 in words is "eight billion, forty-two million, seven hundred seventy-four thousand, five hundred twenty-one".