42105515 has 8 divisors (see below), whose sum is σ = 53498880. Its totient is φ = 31702912.

The previous prime is 42105493. The next prime is 42105523. The reversal of 42105515 is 51550124.

It is a happy number.

42105515 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 a cyclic number.

It is not a de Polignac number, because 42105515 - 2¹² = 42101419 is a prime.

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, 247595 + ... + 247764.

It is an arithmetic number, because the mean of its divisors is an integer number (6687360).

Almost surely, 2^42105515 is an apocalyptic number.

42105515 is a deficient number, since it is larger than the sum of its proper divisors (11393365).

42105515 is a wasteful number, since it uses less digits than its factorization.

42105515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495381.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 42105515 is about 6488.8762509390. The cubic root of 42105515 is about 347.8935107078.

Adding to 42105515 its reverse (51550124), we get a palindrome (93655639).

The spelling of 42105515 in words is "forty-two million, one hundred five thousand, five hundred fifteen".