42640615 has 8 divisors (see below), whose sum is σ = 52417008. Its totient is φ = 33280320.

The previous prime is 42640603. The next prime is 42640639. The reversal of 42640615 is 51604624.

42640615 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42640615 - 2¹⁵ = 42607847 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 103797 + ... + 104206.

It is an arithmetic number, because the mean of its divisors is an integer number (6552126).

Almost surely, 2^42640615 is an apocalyptic number.

42640615 is a deficient number, since it is larger than the sum of its proper divisors (9776393).

42640615 is a wasteful number, since it uses less digits than its factorization.

42640615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208049.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 42640615 is about 6529.9781776052. The cubic root of 42640615 is about 349.3610519552.

It can be divided in two parts, 426 and 40615, that added together give a triangular number (41041 = T₂₈₆).

The spelling of 42640615 in words is "forty-two million, six hundred forty thousand, six hundred fifteen".