42543953 has 4 divisors (see below), whose sum is σ = 42868848. Its totient is φ = 42219060.

The previous prime is 42543947. The next prime is 42543959. The reversal of 42543953 is 35934524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (42543947) and next prime (42543959).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42543953 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (42543959) 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 3 ways as a sum of consecutive naturals, for example, 162251 + ... + 162512.

It is an arithmetic number, because the mean of its divisors is an integer number (10717212).

Almost surely, 2^42543953 is an apocalyptic number.

It is an amenable number.

42543953 is a deficient number, since it is larger than the sum of its proper divisors (324895).

42543953 is a wasteful number, since it uses less digits than its factorization.

42543953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324894.

The product of its digits is 64800, while the sum is 35.

The square root of 42543953 is about 6522.5725752957. The cubic root of 42543953 is about 349.0968633963.

The spelling of 42543953 in words is "forty-two million, five hundred forty-three thousand, nine hundred fifty-three".