42138578 has 8 divisors (see below), whose sum is σ = 64151472. Its totient is φ = 20754756.

The previous prime is 42138559. The next prime is 42138587. The reversal of 42138578 is 87583124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157100 + ... + 157367.

It is an arithmetic number, because the mean of its divisors is an integer number (8018934).

Almost surely, 2^42138578 is an apocalyptic number.

42138578 is a deficient number, since it is larger than the sum of its proper divisors (22012894).

42138578 is a wasteful number, since it uses less digits than its factorization.

42138578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314536.

The product of its digits is 53760, while the sum is 38.

The square root of 42138578 is about 6491.4234186348. The cubic root of 42138578 is about 347.9845470304.

The spelling of 42138578 in words is "forty-two million, one hundred thirty-eight thousand, five hundred seventy-eight".