42512505 has 32 divisors (see below), whose sum is σ = 78910464. Its totient is φ = 19141056.

The previous prime is 42512489. The next prime is 42512527. The reversal of 42512505 is 50521524.

It is a happy number.

It is not a de Polignac number, because 42512505 - 2⁴ = 42512489 is a prime.

It is a Curzon 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 31 ways as a sum of consecutive naturals, for example, 4014 + ... + 10056.

It is an arithmetic number, because the mean of its divisors is an integer number (2465952).

Almost surely, 2^42512505 is an apocalyptic number.

It is an amenable number.

42512505 is a deficient number, since it is larger than the sum of its proper divisors (36397959).

42512505 is a wasteful number, since it uses less digits than its factorization.

42512505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6125.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 42512505 is about 6520.1614243821. The cubic root of 42512505 is about 349.0108260668.

The spelling of 42512505 in words is "forty-two million, five hundred twelve thousand, five hundred five".