8057021 has 6 divisors (see below), whose sum is σ = 9372510. Its totient is φ = 6905976.

The previous prime is 8057017. The next prime is 8057029. The reversal of 8057021 is 1207508.

It can be written as a sum of positive squares in only one way, i.e., 4351396 + 3705625 = 2086^2 + 1925^2 .

It is not a de Polignac number, because 8057021 - 2² = 8057017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8057029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 82166 + ... + 82263.

It is an arithmetic number, because the mean of its divisors is an integer number (1562085).

Almost surely, 2^8057021 is an apocalyptic number.

It is an amenable number.

8057021 is a deficient number, since it is larger than the sum of its proper divisors (1315489).

8057021 is a wasteful number, since it uses less digits than its factorization.

8057021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164443 (or 164436 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 8057021 is about 2838.4892108303. The cubic root of 8057021 is about 200.4740504929.

The spelling of 8057021 in words is "eight million, fifty-seven thousand, twenty-one".