42508559 has 2 divisors, whose sum is σ = 42508560. Its totient is φ = 42508558.

The previous prime is 42508537. The next prime is 42508573. The reversal of 42508559 is 95580524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42508559 - 2²⁰ = 41459983 is a prime.

It is a Chen prime.

It is equal to p_2576675 and since 42508559 and 2576675 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42508159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21254279 + 21254280.

It is an arithmetic number, because the mean of its divisors is an integer number (21254280).

Almost surely, 2^42508559 is an apocalyptic number.

42508559 is a deficient number, since it is larger than the sum of its proper divisors (1).

42508559 is an equidigital number, since it uses as much as digits as its factorization.

42508559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 42508559 is about 6519.8588174898. The cubic root of 42508559 is about 349.0000273670. Note that the first 4 decimals are identical.

The spelling of 42508559 in words is "forty-two million, five hundred eight thousand, five hundred fifty-nine".