42518471 has 4 divisors (see below), whose sum is σ = 42544872. Its totient is φ = 42492072.

The previous prime is 42518459. The next prime is 42518477. The reversal of 42518471 is 17481524.

It is a happy number.

42518471 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42518471 - 2¹⁸ = 42256327 is a prime.

It is a super-3 number, since 3×42518471³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42518477) 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 3 ways as a sum of consecutive naturals, for example, 10616 + ... + 14061.

It is an arithmetic number, because the mean of its divisors is an integer number (10636218).

Almost surely, 2^42518471 is an apocalyptic number.

42518471 is a deficient number, since it is larger than the sum of its proper divisors (26401).

42518471 is a wasteful number, since it uses less digits than its factorization.

42518471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26400.

The product of its digits is 8960, while the sum is 32.

The square root of 42518471 is about 6520.6189123426. The cubic root of 42518471 is about 349.0271514687.

Adding to 42518471 its reverse (17481524), we get a palindrome (59999995).

The spelling of 42518471 in words is "forty-two million, five hundred eighteen thousand, four hundred seventy-one".