42047615 has 4 divisors (see below), whose sum is σ = 50457144. Its totient is φ = 33638088.

The previous prime is 42047609. The next prime is 42047617. The reversal of 42047615 is 51674024.

42047615 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42047615 - 2²⁰ = 40999039 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 (42047617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4204757 + ... + 4204766.

It is an arithmetic number, because the mean of its divisors is an integer number (12614286).

Almost surely, 2^42047615 is an apocalyptic number.

42047615 is a deficient number, since it is larger than the sum of its proper divisors (8409529).

42047615 is an equidigital number, since it uses as much as digits as its factorization.

42047615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8409528.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 42047615 is about 6484.4132348270. The cubic root of 42047615 is about 347.7339728235.

The spelling of 42047615 in words is "forty-two million, forty-seven thousand, six hundred fifteen".