42521315 has 8 divisors (see below), whose sum is σ = 51640848. Its totient is φ = 33606880.

The previous prime is 42521299. The next prime is 42521329. The reversal of 42521315 is 51312524.

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

It is not a de Polignac number, because 42521315 - 2⁴ = 42521299 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50816 + ... + 51645.

It is an arithmetic number, because the mean of its divisors is an integer number (6455106).

Almost surely, 2^42521315 is an apocalyptic number.

42521315 is a deficient number, since it is larger than the sum of its proper divisors (9119533).

42521315 is a wasteful number, since it uses less digits than its factorization.

42521315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102549.

The product of its digits is 1200, while the sum is 23.

The square root of 42521315 is about 6520.8369861545. The cubic root of 42521315 is about 349.0349332717.

Adding to 42521315 its reverse (51312524), we get a palindrome (93833839).

The spelling of 42521315 in words is "forty-two million, five hundred twenty-one thousand, three hundred fifteen".