42420515 has 8 divisors (see below), whose sum is σ = 51477120. Its totient is φ = 33554752.

The previous prime is 42420509. The next prime is 42420529. The reversal of 42420515 is 51502424.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42420515 - 2⁶ = 42420451 is a prime.

It is a plaindrome in base 12.

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 7 ways as a sum of consecutive naturals, for example, 47219 + ... + 48108.

It is an arithmetic number, because the mean of its divisors is an integer number (6434640).

Almost surely, 2^42420515 is an apocalyptic number.

42420515 is a deficient number, since it is larger than the sum of its proper divisors (9056605).

42420515 is an equidigital number, since it uses as much as digits as its factorization.

42420515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95421.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 42420515 is about 6513.1033309783. The cubic root of 42420515 is about 348.7589104578.

Adding to 42420515 its reverse (51502424), we get a palindrome (93922939).

The spelling of 42420515 in words is "forty-two million, four hundred twenty thousand, five hundred fifteen".