42842869 has 2 divisors, whose sum is σ = 42842870. Its totient is φ = 42842868.

The previous prime is 42842819. The next prime is 42842927. The reversal of 42842869 is 96824824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34374769 + 8468100 = 5863^2 + 2910^2 .

It is a cyclic number.

It is not a de Polignac number, because 42842869 - 2⁹ = 42842357 is a prime.

It is a super-2 number, since 2×42842869² = 3671022848302322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42842819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21421434 + 21421435.

It is an arithmetic number, because the mean of its divisors is an integer number (21421435).

Almost surely, 2^42842869 is an apocalyptic number.

It is an amenable number.

42842869 is a deficient number, since it is larger than the sum of its proper divisors (1).

42842869 is an equidigital number, since it uses as much as digits as its factorization.

42842869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 43.

The square root of 42842869 is about 6545.4464324445. The cubic root of 42842869 is about 349.9125468577.

The spelling of 42842869 in words is "forty-two million, eight hundred forty-two thousand, eight hundred sixty-nine".