42515404 has 12 divisors (see below), whose sum is σ = 74576824. Its totient is φ = 21207744.

The previous prime is 42515399. The next prime is 42515411. The reversal of 42515404 is 40451524.

It is a happy number.

42515404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 16.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10542 + ... + 14005.

Almost surely, 2^42515404 is an apocalyptic number.

It is an amenable number.

42515404 is a deficient number, since it is larger than the sum of its proper divisors (32061420).

42515404 is a wasteful number, since it uses less digits than its factorization.

42515404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24984 (or 24982 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 42515404 is about 6520.3837310391. The cubic root of 42515404 is about 349.0187591004.

Adding to 42515404 its reverse (40451524), we get a palindrome (82966928).

The spelling of 42515404 in words is "forty-two million, five hundred fifteen thousand, four hundred four".