42403515 has 32 divisors (see below), whose sum is σ = 84589056. Its totient is φ = 17621760.

The previous prime is 42403499. The next prime is 42403519. The reversal of 42403515 is 51530424.

42403515 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 42403515 - 2⁴ = 42403499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42403519) 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 31 ways as a sum of consecutive naturals, for example, 17202 + ... + 19511.

It is an arithmetic number, because the mean of its divisors is an integer number (2643408).

Almost surely, 2^42403515 is an apocalyptic number.

42403515 is a deficient number, since it is larger than the sum of its proper divisors (42185541).

42403515 is a wasteful number, since it uses less digits than its factorization.

42403515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36739.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 42403515 is about 6511.7981387632. The cubic root of 42403515 is about 348.7123159138.

Adding to 42403515 its reverse (51530424), we get a palindrome (93933939).

The spelling of 42403515 in words is "forty-two million, four hundred three thousand, five hundred fifteen".