42543615 has 8 divisors (see below), whose sum is σ = 68069808. Its totient is φ = 22689920.

The previous prime is 42543581. The next prime is 42543617. The reversal of 42543615 is 51634524.

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

It is not a de Polignac number, because 42543615 - 2⁸ = 42543359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42543617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1418106 + ... + 1418135.

It is an arithmetic number, because the mean of its divisors is an integer number (8508726).

Almost surely, 2^42543615 is an apocalyptic number.

42543615 is a deficient number, since it is larger than the sum of its proper divisors (25526193).

42543615 is a wasteful number, since it uses less digits than its factorization.

42543615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2836249.

The product of its digits is 14400, while the sum is 30.

The square root of 42543615 is about 6522.5466652221. The cubic root of 42543615 is about 349.0959389010.

Subtracting 42543615 from its reverse (51634524), we obtain a palindrome (9090909).

The spelling of 42543615 in words is "forty-two million, five hundred forty-three thousand, six hundred fifteen".