8142757021 has 16 divisors (see below), whose sum is σ = 9798572160. Its totient is φ = 6610291200.

The previous prime is 8142756991. The next prime is 8142757027. The reversal of 8142757021 is 1207572418.

It is a cyclic number.

It is not a de Polignac number, because 8142757021 - 2¹¹ = 8142754973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8142757027) 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, 650421 + ... + 662821.

It is an arithmetic number, because the mean of its divisors is an integer number (612410760).

Almost surely, 2^8142757021 is an apocalyptic number.

It is an amenable number.

8142757021 is a deficient number, since it is larger than the sum of its proper divisors (1655815139).

8142757021 is a wasteful number, since it uses less digits than its factorization.

8142757021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17364.

The product of its (nonzero) digits is 31360, while the sum is 37.

The square root of 8142757021 is about 90237.2263591917. The cubic root of 8142757021 is about 2011.8263493091.

The spelling of 8142757021 in words is "eight billion, one hundred forty-two million, seven hundred fifty-seven thousand, twenty-one".