42709915 has 4 divisors (see below), whose sum is σ = 51251904. Its totient is φ = 34167928.

The previous prime is 42709907. The next prime is 42709921. The reversal of 42709915 is 51990724.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42709915 - 2³ = 42709907 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4270987 + ... + 4270996.

It is an arithmetic number, because the mean of its divisors is an integer number (12812976).

Almost surely, 2^42709915 is an apocalyptic number.

42709915 is a deficient number, since it is larger than the sum of its proper divisors (8541989).

42709915 is an equidigital number, since it uses as much as digits as its factorization.

42709915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8541988.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 42709915 is about 6535.2823198390. The cubic root of 42709915 is about 349.5502113351.

The spelling of 42709915 in words is "forty-two million, seven hundred nine thousand, nine hundred fifteen".