42101515 has 16 divisors (see below), whose sum is σ = 52588800. Its totient is φ = 32330592.

The previous prime is 42101513. The next prime is 42101531. The reversal of 42101515 is 51510124.

It is a cyclic number.

It is not a de Polignac number, because 42101515 - 2¹ = 42101513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42101492 and 42101501.

It is not an unprimeable number, because it can be changed into a prime (42101513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11026 + ... + 14344.

It is an arithmetic number, because the mean of its divisors is an integer number (3286800).

Almost surely, 2^42101515 is an apocalyptic number.

42101515 is a deficient number, since it is larger than the sum of its proper divisors (10487285).

42101515 is a wasteful number, since it uses less digits than its factorization.

42101515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3426.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 42101515 is about 6488.5680238401. The cubic root of 42101515 is about 347.8824937970.

Adding to 42101515 its reverse (51510124), we get a palindrome (93611639).

The spelling of 42101515 in words is "forty-two million, one hundred one thousand, five hundred fifteen".