42865769 has 2 divisors, whose sum is σ = 42865770. Its totient is φ = 42865768.

The previous prime is 42865751. The next prime is 42865807. The reversal of 42865769 is 96756824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40806544 + 2059225 = 6388^2 + 1435^2 .

It is a cyclic number.

It is not a de Polignac number, because 42865769 - 2⁸ = 42865513 is a prime.

It is a super-2 number, since 2×42865769² = 3674948303922722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (42862769) by changing a digit.

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 as a sum of consecutive naturals, namely, 21432884 + 21432885.

It is an arithmetic number, because the mean of its divisors is an integer number (21432885).

Almost surely, 2^42865769 is an apocalyptic number.

It is an amenable number.

42865769 is a deficient number, since it is larger than the sum of its proper divisors (1).

42865769 is an equidigital number, since it uses as much as digits as its factorization.

42865769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 47.

The square root of 42865769 is about 6547.1955064745. The cubic root of 42865769 is about 349.9748798298.

It can be divided in two parts, 42865 and 769, that added together give a palindrome (43634).

The spelling of 42865769 in words is "forty-two million, eight hundred sixty-five thousand, seven hundred sixty-nine".