42138415 has 16 divisors (see below), whose sum is σ = 57563136. Its totient is φ = 29312800.

The previous prime is 42138413. The next prime is 42138431. The reversal of 42138415 is 51483124.

It is not a de Polignac number, because 42138415 - 2¹ = 42138413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42138413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15391 + ... + 17920.

It is an arithmetic number, because the mean of its divisors is an integer number (3597696).

Almost surely, 2^42138415 is an apocalyptic number.

42138415 is a deficient number, since it is larger than the sum of its proper divisors (15424721).

42138415 is a wasteful number, since it uses less digits than its factorization.

42138415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33350.

The product of its digits is 3840, while the sum is 28.

The square root of 42138415 is about 6491.4108635951. The cubic root of 42138415 is about 347.9840983398.

The spelling of 42138415 in words is "forty-two million, one hundred thirty-eight thousand, four hundred fifteen".