42007505 has 16 divisors (see below), whose sum is σ = 51435648. Its totient is φ = 32928000.

The previous prime is 42007501. The next prime is 42007523. The reversal of 42007505 is 50570024.

42007505 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 42007505 - 2² = 42007501 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42007501) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 85310 + ... + 85800.

It is an arithmetic number, because the mean of its divisors is an integer number (3214728).

Almost surely, 2^42007505 is an apocalyptic number.

It is an amenable number.

42007505 is a deficient number, since it is larger than the sum of its proper divisors (9428143).

42007505 is a wasteful number, since it uses less digits than its factorization.

42007505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 42007505 is about 6481.3196958644. The cubic root of 42007505 is about 347.6233676841.

Adding to 42007505 its reverse (50570024), we get a palindrome (92577529).

The spelling of 42007505 in words is "forty-two million, seven thousand, five hundred five".