42015405 has 16 divisors (see below), whose sum is σ = 67368960. Its totient is φ = 22360128.

The previous prime is 42015383. The next prime is 42015419. The reversal of 42015405 is 50451024.

It is not a de Polignac number, because 42015405 - 2⁶ = 42015341 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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4884 + ... + 10386.

It is an arithmetic number, because the mean of its divisors is an integer number (4210560).

Almost surely, 2^42015405 is an apocalyptic number.

It is an amenable number.

42015405 is a deficient number, since it is larger than the sum of its proper divisors (25353555).

42015405 is a wasteful number, since it uses less digits than its factorization.

42015405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6020.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 42015405 is about 6481.9291109977. The cubic root of 42015405 is about 347.6451578576.

Adding to 42015405 its reverse (50451024), we get a palindrome (92466429).

The spelling of 42015405 in words is "forty-two million, fifteen thousand, four hundred five".