42138085 has 16 divisors (see below), whose sum is σ = 56339712. Its totient is φ = 29992000.

The previous prime is 42138077. The next prime is 42138097. The reversal of 42138085 is 58083124.

It is not a de Polignac number, because 42138085 - 2³ = 42138077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5566 + ... + 10735.

It is an arithmetic number, because the mean of its divisors is an integer number (3521232).

Almost surely, 2^42138085 is an apocalyptic number.

It is an amenable number.

42138085 is a deficient number, since it is larger than the sum of its proper divisors (14201627).

42138085 is a wasteful number, since it uses less digits than its factorization.

42138085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16364.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 42138085 is about 6491.3854453422. The cubic root of 42138085 is about 347.9831899442.

The spelling of 42138085 in words is "forty-two million, one hundred thirty-eight thousand, eighty-five".