42271065 has 28 divisors (see below), whose sum is σ = 76059684. Its totient is φ = 22542624.

The previous prime is 42271063. The next prime is 42271069. The reversal of 42271065 is 56017224.

It can be written as a sum of positive squares in 2 ways, for example, as 27154521 + 15116544 = 5211^2 + 3888^2 .

It is not a de Polignac number, because 42271065 - 2¹ = 42271063 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (42271063) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2154 + ... + 9443.

Almost surely, 2^42271065 is an apocalyptic number.

42271065 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42271065 is a deficient number, since it is larger than the sum of its proper divisors (33788619).

42271065 is an equidigital number, since it uses as much as digits as its factorization.

42271065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11620 (or 11605 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 42271065 is about 6501.6201826929. The cubic root of 42271065 is about 348.3488624035.

Adding to 42271065 its reverse (56017224), we get a palindrome (98288289).

The spelling of 42271065 in words is "forty-two million, two hundred seventy-one thousand, sixty-five".