42912215 has 16 divisors (see below), whose sum is σ = 53415936. Its totient is φ = 33060000.

The previous prime is 42912179. The next prime is 42912223. The reversal of 42912215 is 51221924.

It is not a de Polignac number, because 42912215 - 2¹⁰ = 42911191 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

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, 38354 + ... + 39456.

It is an arithmetic number, because the mean of its divisors is an integer number (3338496).

Almost surely, 2^42912215 is an apocalyptic number.

42912215 is a deficient number, since it is larger than the sum of its proper divisors (10503721).

42912215 is a wasteful number, since it uses less digits than its factorization.

42912215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390.

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

The square root of 42912215 is about 6550.7415610754. The cubic root of 42912215 is about 350.1012360212.

The spelling of 42912215 in words is "forty-two million, nine hundred twelve thousand, two hundred fifteen".