42157859 has 2 divisors, whose sum is σ = 42157860. Its totient is φ = 42157858.

The previous prime is 42157853. The next prime is 42157877. The reversal of 42157859 is 95875124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42157859 - 2¹² = 42153763 is a prime.

It is not a weakly prime, because it can be changed into another prime (42157853) 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, 21078929 + 21078930.

It is an arithmetic number, because the mean of its divisors is an integer number (21078930).

Almost surely, 2^42157859 is an apocalyptic number.

42157859 is a deficient number, since it is larger than the sum of its proper divisors (1).

42157859 is an equidigital number, since it uses as much as digits as its factorization.

42157859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 41.

The square root of 42157859 is about 6492.9083622056. The cubic root of 42157859 is about 348.0376137394.

The spelling of 42157859 in words is "forty-two million, one hundred fifty-seven thousand, eight hundred fifty-nine".