42427515 has 16 divisors (see below), whose sum is σ = 73106208. Its totient is φ = 20887296.

The previous prime is 42427501. The next prime is 42427531. The reversal of 42427515 is 51572424.

It is not a de Polignac number, because 42427515 - 2¹⁰ = 42426491 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108594 + ... + 108983.

It is an arithmetic number, because the mean of its divisors is an integer number (4569138).

Almost surely, 2^42427515 is an apocalyptic number.

42427515 is a deficient number, since it is larger than the sum of its proper divisors (30678693).

42427515 is a wasteful number, since it uses less digits than its factorization.

42427515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217598.

The product of its digits is 11200, while the sum is 30.

The square root of 42427515 is about 6513.6406870505. The cubic root of 42427515 is about 348.7780928283.

Adding to 42427515 its reverse (51572424), we get a palindrome (93999939).

The spelling of 42427515 in words is "forty-two million, four hundred twenty-seven thousand, five hundred fifteen".