42015559 has 2 divisors, whose sum is σ = 42015560. Its totient is φ = 42015558.

The previous prime is 42015541. The next prime is 42015563. The reversal of 42015559 is 95551024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42015559 - 2⁵ = 42015527 is a prime.

It is equal to p_2548507 and since 42015559 and 2548507 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42015559.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42015539) 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, 21007779 + 21007780.

It is an arithmetic number, because the mean of its divisors is an integer number (21007780).

Almost surely, 2^42015559 is an apocalyptic number.

42015559 is a deficient number, since it is larger than the sum of its proper divisors (1).

42015559 is an equidigital number, since it uses as much as digits as its factorization.

42015559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 42015559 is about 6481.9409901664. The cubic root of 42015559 is about 347.6455826009.

The spelling of 42015559 in words is "forty-two million, fifteen thousand, five hundred fifty-nine".