42129215 has 8 divisors (see below), whose sum is σ = 52753248. Its totient is φ = 32237920.

The previous prime is 42129209. The next prime is 42129229. The reversal of 42129215 is 51292124.

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

It is not a de Polignac number, because 42129215 - 2¹² = 42125119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183056 + ... + 183285.

It is an arithmetic number, because the mean of its divisors is an integer number (6594156).

Almost surely, 2^42129215 is an apocalyptic number.

42129215 is a deficient number, since it is larger than the sum of its proper divisors (10624033).

42129215 is a wasteful number, since it uses less digits than its factorization.

42129215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366369.

The product of its digits is 1440, while the sum is 26.

The square root of 42129215 is about 6490.7021962188. The cubic root of 42129215 is about 347.9587715944.

The spelling of 42129215 in words is "forty-two million, one hundred twenty-nine thousand, two hundred fifteen".