42240513 has 16 divisors (see below), whose sum is σ = 64727936. Its totient is φ = 24001920.

The previous prime is 42240511. The next prime is 42240533. The reversal of 42240513 is 31504224.

It is not a de Polignac number, because 42240513 - 2¹ = 42240511 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 42240513.

It is not an unprimeable number, because it can be changed into a prime (42240511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1756 + ... + 9357.

It is an arithmetic number, because the mean of its divisors is an integer number (4045496).

Almost surely, 2^42240513 is an apocalyptic number.

It is an amenable number.

42240513 is a deficient number, since it is larger than the sum of its proper divisors (22487423).

42240513 is a wasteful number, since it uses less digits than its factorization.

42240513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11304.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 42240513 is about 6499.2701897982. The cubic root of 42240513 is about 348.2649175148.

Adding to 42240513 its reverse (31504224), we get a palindrome (73744737).

The spelling of 42240513 in words is "forty-two million, two hundred forty thousand, five hundred thirteen".