42447015 has 24 divisors (see below), whose sum is σ = 79235520. Its totient is φ = 20896704.

The previous prime is 42446951. The next prime is 42447023. The reversal of 42447015 is 51074424.

42447015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42447015 - 2⁶ = 42446951 is a prime.

It is a nialpdrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 42447015.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 35695 + ... + 36864.

It is an arithmetic number, because the mean of its divisors is an integer number (3301480).

Almost surely, 2^42447015 is an apocalyptic number.

42447015 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

42447015 is a deficient number, since it is larger than the sum of its proper divisors (36788505).

42447015 is a wasteful number, since it uses less digits than its factorization.

42447015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72583 (or 72580 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 42447015 is about 6515.1373738395. The cubic root of 42447015 is about 348.8315183087.

The spelling of 42447015 in words is "forty-two million, four hundred forty-seven thousand, fifteen".