42459871 has 2 divisors, whose sum is σ = 42459872. Its totient is φ = 42459870.

The previous prime is 42459839. The next prime is 42459919. The reversal of 42459871 is 17895424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42459871 - 2⁵ = 42459839 is a prime.

It is equal to p_2573878 and since 42459871 and 2573878 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 (42459811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21229935 + 21229936.

It is an arithmetic number, because the mean of its divisors is an integer number (21229936).

Almost surely, 2^42459871 is an apocalyptic number.

42459871 is a deficient number, since it is larger than the sum of its proper divisors (1).

42459871 is an equidigital number, since it uses as much as digits as its factorization.

42459871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 40.

The square root of 42459871 is about 6516.1239245429. The cubic root of 42459871 is about 348.8667318200.

The spelling of 42459871 in words is "forty-two million, four hundred fifty-nine thousand, eight hundred seventy-one".