42543513 has 12 divisors (see below), whose sum is σ = 62143380. Its totient is φ = 28043136.

The previous prime is 42543511. The next prime is 42543517. The reversal of 42543513 is 31534524.

It can be written as a sum of positive squares in 2 ways, for example, as 14379264 + 28164249 = 3792^2 + 5307^2 .

It is not a de Polignac number, because 42543513 - 2¹ = 42543511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42543511) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 25756 + ... + 27357.

It is an arithmetic number, because the mean of its divisors is an integer number (5178615).

Almost surely, 2^42543513 is an apocalyptic number.

It is an amenable number.

42543513 is a deficient number, since it is larger than the sum of its proper divisors (19599867).

42543513 is a wasteful number, since it uses less digits than its factorization.

42543513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53208 (or 53205 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 42543513 is about 6522.5388461856. The cubic root of 42543513 is about 349.0956599103.

The spelling of 42543513 in words is "forty-two million, five hundred forty-three thousand, five hundred thirteen".