42919915 has 8 divisors (see below), whose sum is σ = 51539328. Its totient is φ = 34312320.

The previous prime is 42919901. The next prime is 42919927. The reversal of 42919915 is 51991924.

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

It is not a de Polignac number, because 42919915 - 2¹⁷ = 42788843 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11299 + ... + 14611.

It is an arithmetic number, because the mean of its divisors is an integer number (6442416).

Almost surely, 2^42919915 is an apocalyptic number.

42919915 is a deficient number, since it is larger than the sum of its proper divisors (8619413).

42919915 is a wasteful number, since it uses less digits than its factorization.

42919915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5909.

The product of its digits is 29160, while the sum is 40.

The square root of 42919915 is about 6551.3292544338. The cubic root of 42919915 is about 350.1221750343.

It can be divided in two parts, 42919 and 915, that added together give a palindrome (43834).

The spelling of 42919915 in words is "forty-two million, nine hundred nineteen thousand, nine hundred fifteen".