42568081 has 2 divisors, whose sum is σ = 42568082. Its totient is φ = 42568080.

The previous prime is 42568073. The next prime is 42568103. The reversal of 42568081 is 18086524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41486481 + 1081600 = 6441^2 + 1040^2 .

It is a cyclic number.

It is not a de Polignac number, because 42568081 - 2³ = 42568073 is a prime.

It is a super-2 number, since 2×42568081² = 3624083040045122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42568021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21284040 + 21284041.

It is an arithmetic number, because the mean of its divisors is an integer number (21284041).

Almost surely, 2^42568081 is an apocalyptic number.

It is an amenable number.

42568081 is a deficient number, since it is larger than the sum of its proper divisors (1).

42568081 is an equidigital number, since it uses as much as digits as its factorization.

42568081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 42568081 is about 6524.4218900988. The cubic root of 42568081 is about 349.1628454902.

The spelling of 42568081 in words is "forty-two million, five hundred sixty-eight thousand, eighty-one".