42120615 has 32 divisors (see below), whose sum is σ = 71628480. Its totient is φ = 21095424.

The previous prime is 42120593. The next prime is 42120623. The reversal of 42120615 is 51602124.

42120615 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 42120615 - 2⁷ = 42120487 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42120591 and 42120600.

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, 14787 + ... + 17403.

It is an arithmetic number, because the mean of its divisors is an integer number (2238390).

Almost surely, 2^42120615 is an apocalyptic number.

42120615 is a deficient number, since it is larger than the sum of its proper divisors (29507865).

42120615 is a wasteful number, since it uses less digits than its factorization.

42120615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2691.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 42120615 is about 6490.0396763040. The cubic root of 42120615 is about 347.9350932587.

Adding to 42120615 its reverse (51602124), we get a palindrome (93722739).

The spelling of 42120615 in words is "forty-two million, one hundred twenty thousand, six hundred fifteen".