42543265 has 8 divisors (see below), whose sum is σ = 54055080. Its totient is φ = 32032512.

The previous prime is 42543187. The next prime is 42543269. The reversal of 42543265 is 56234524.

It can be written as a sum of positive squares in 4 ways, for example, as 4004001 + 38539264 = 2001^2 + 6208^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 42543265 - 2¹⁵ = 42510497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42543269) 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, 250170 + ... + 250339.

It is an arithmetic number, because the mean of its divisors is an integer number (6756885).

Almost surely, 2^42543265 is an apocalyptic number.

It is an amenable number.

42543265 is a deficient number, since it is larger than the sum of its proper divisors (11511815).

42543265 is a wasteful number, since it uses less digits than its factorization.

42543265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500531.

The product of its digits is 28800, while the sum is 31.

The square root of 42543265 is about 6522.5198351557. The cubic root of 42543265 is about 349.0949815782.

Adding to 42543265 its reverse (56234524), we get a palindrome (98777789).

The spelling of 42543265 in words is "forty-two million, five hundred forty-three thousand, two hundred sixty-five".