42457843 has 2 divisors, whose sum is σ = 42457844. Its totient is φ = 42457842.

The previous prime is 42457819. The next prime is 42457867. The reversal of 42457843 is 34875424.

It is a balanced prime because it is at equal distance from previous prime (42457819) and next prime (42457867).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42457843 is a prime.

It is not a weakly prime, because it can be changed into another prime (42457043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21228921 + 21228922.

It is an arithmetic number, because the mean of its divisors is an integer number (21228922).

Almost surely, 2^42457843 is an apocalyptic number.

42457843 is a deficient number, since it is larger than the sum of its proper divisors (1).

42457843 is an equidigital number, since it uses as much as digits as its factorization.

42457843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 37.

The square root of 42457843 is about 6515.9683087013. The cubic root of 42457843 is about 348.8611774540.

The spelling of 42457843 in words is "forty-two million, four hundred fifty-seven thousand, eight hundred forty-three".