42578959 has 2 divisors, whose sum is σ = 42578960. Its totient is φ = 42578958.

The previous prime is 42578953. The next prime is 42578993. The reversal of 42578959 is 95987524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42578959 - 2⁵ = 42578927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42578953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21289479 + 21289480.

It is an arithmetic number, because the mean of its divisors is an integer number (21289480).

Almost surely, 2^42578959 is an apocalyptic number.

42578959 is a deficient number, since it is larger than the sum of its proper divisors (1).

42578959 is an equidigital number, since it uses as much as digits as its factorization.

42578959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 49.

The square root of 42578959 is about 6525.2554739259. The cubic root of 42578959 is about 349.1925850654.

The spelling of 42578959 in words is "forty-two million, five hundred seventy-eight thousand, nine hundred fifty-nine".