42161898 has 16 divisors (see below), whose sum is σ = 87990336. Its totient is φ = 13442880.

The previous prime is 42161869. The next prime is 42161927. The reversal of 42161898 is 89816124.

42161898 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (42161869) and next prime (42161927).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152623 + ... + 152898.

It is an arithmetic number, because the mean of its divisors is an integer number (5499396).

Almost surely, 2^42161898 is an apocalyptic number.

42161898 is an abundant number, since it is smaller than the sum of its proper divisors (45828438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42161898 is a wasteful number, since it uses less digits than its factorization.

42161898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305549.

The product of its digits is 27648, while the sum is 39.

The square root of 42161898 is about 6493.2193864061. The cubic root of 42161898 is about 348.0487281482.

The spelling of 42161898 in words is "forty-two million, one hundred sixty-one thousand, eight hundred ninety-eight".