42505015 has 16 divisors (see below), whose sum is σ = 61722432. Its totient is φ = 27431424.

The previous prime is 42505013. The next prime is 42505031. The reversal of 42505015 is 51050524.

It is a cyclic number.

It is not a de Polignac number, because 42505015 - 2¹ = 42505013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42505013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35124 + ... + 36313.

It is an arithmetic number, because the mean of its divisors is an integer number (3857652).

Almost surely, 2^42505015 is an apocalyptic number.

42505015 is a deficient number, since it is larger than the sum of its proper divisors (19217417).

42505015 is a wasteful number, since it uses less digits than its factorization.

42505015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71466.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 42505015 is about 6519.5870267986. The cubic root of 42505015 is about 348.9903282186.

Adding to 42505015 its reverse (51050524), we get a palindrome (93555539).

The spelling of 42505015 in words is "forty-two million, five hundred five thousand, fifteen".