42771145 has 16 divisors (see below), whose sum is σ = 54214272. Its totient is φ = 32327680.

The previous prime is 42771139. The next prime is 42771151. The reversal of 42771145 is 54117724.

It is an interprime number because it is at equal distance from previous prime (42771139) and next prime (42771151).

It is not a de Polignac number, because 42771145 - 2⁹ = 42770633 is a prime.

It is a super-2 number, since 2×42771145² = 3658741689222050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7305 + ... + 11785.

It is an arithmetic number, because the mean of its divisors is an integer number (3388392).

Almost surely, 2^42771145 is an apocalyptic number.

It is an amenable number.

42771145 is a deficient number, since it is larger than the sum of its proper divisors (11443127).

42771145 is a wasteful number, since it uses less digits than its factorization.

42771145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4592.

The product of its digits is 7840, while the sum is 31.

The square root of 42771145 is about 6539.9652139748. The cubic root of 42771145 is about 349.7171728759.

Adding to 42771145 its reverse (54117724), we get a palindrome (96888869).

The spelling of 42771145 in words is "forty-two million, seven hundred seventy-one thousand, one hundred forty-five".