42875869 has 2 divisors, whose sum is σ = 42875870. Its totient is φ = 42875868.

The previous prime is 42875867. The next prime is 42875881. The reversal of 42875869 is 96857824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41447844 + 1428025 = 6438^2 + 1195^2 .

It is a cyclic number.

It is not a de Polignac number, because 42875869 - 2¹ = 42875867 is a prime.

It is a super-2 number, since 2×42875869² = 3676680285010322, which contains 22 as substring.

Together with 42875867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42875867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21437934 + 21437935.

It is an arithmetic number, because the mean of its divisors is an integer number (21437935).

Almost surely, 2^42875869 is an apocalyptic number.

It is an amenable number.

42875869 is a deficient number, since it is larger than the sum of its proper divisors (1).

42875869 is an equidigital number, since it uses as much as digits as its factorization.

42875869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 49.

The square root of 42875869 is about 6547.9667836665. The cubic root of 42875869 is about 350.0023646099.

The spelling of 42875869 in words is "forty-two million, eight hundred seventy-five thousand, eight hundred sixty-nine".