42129615 has 32 divisors (see below), whose sum is σ = 73861632. Its totient is φ = 20336000.

The previous prime is 42129559. The next prime is 42129641. The reversal of 42129615 is 51692124.

42129615 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 42129615 - 2¹¹ = 42127567 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 50905 + ... + 51725.

It is an arithmetic number, because the mean of its divisors is an integer number (2308176).

Almost surely, 2^42129615 is an apocalyptic number.

42129615 is a deficient number, since it is larger than the sum of its proper divisors (31732017).

42129615 is a wasteful number, since it uses less digits than its factorization.

42129615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151.

The product of its digits is 4320, while the sum is 30.

The square root of 42129615 is about 6490.7330094528. The cubic root of 42129615 is about 347.9598728339.

The spelling of 42129615 in words is "forty-two million, one hundred twenty-nine thousand, six hundred fifteen".