42138346 has 16 divisors (see below), whose sum is σ = 66484224. Its totient is φ = 19991664.

The previous prime is 42138319. The next prime is 42138347. The reversal of 42138346 is 64383124.

It is not an unprimeable number, because it can be changed into a prime (42138347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2236 + ... + 9448.

It is an arithmetic number, because the mean of its divisors is an integer number (4155264).

Almost surely, 2^42138346 is an apocalyptic number.

42138346 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

42138346 is a deficient number, since it is larger than the sum of its proper divisors (24345878).

42138346 is a wasteful number, since it uses less digits than its factorization.

42138346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7365.

The product of its digits is 13824, while the sum is 31.

The square root of 42138346 is about 6491.4055488777. The cubic root of 42138346 is about 347.9839084029.

The spelling of 42138346 in words is "forty-two million, one hundred thirty-eight thousand, three hundred forty-six".