42515432 has 8 divisors (see below), whose sum is σ = 79716450. Its totient is φ = 21257712.

The previous prime is 42515411. The next prime is 42515437. The reversal of 42515432 is 23451524.

It is a happy number.

42515432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 42172036 + 343396 = 6494^2 + 586^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (42515437) 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 as a sum of consecutive naturals, namely, 2657207 + ... + 2657222.

Almost surely, 2^42515432 is an apocalyptic number.

It is an amenable number.

42515432 is a deficient number, since it is larger than the sum of its proper divisors (37201018).

42515432 is a wasteful number, since it uses less digits than its factorization.

42515432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5314435 (or 5314431 counting only the distinct ones).

The product of its digits is 4800, while the sum is 26.

The square root of 42515432 is about 6520.3858781517. The cubic root of 42515432 is about 349.0188357198.

Adding to 42515432 its reverse (23451524), we get a palindrome (65966956).

The spelling of 42515432 in words is "forty-two million, five hundred fifteen thousand, four hundred thirty-two".