42321543 has 8 divisors (see below), whose sum is σ = 61558656. Its totient is φ = 25649400.

The previous prime is 42321511. The next prime is 42321557. The reversal of 42321543 is 34512324.

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

It is not a de Polignac number, because 42321543 - 2⁵ = 42321511 is a prime.

It is a super-2 number, since 2×42321543² = 3582226003801698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42321563) 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, 641203 + ... + 641268.

It is an arithmetic number, because the mean of its divisors is an integer number (7694832).

Almost surely, 2^42321543 is an apocalyptic number.

42321543 is a deficient number, since it is larger than the sum of its proper divisors (19237113).

42321543 is a wasteful number, since it uses less digits than its factorization.

42321543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282485.

The product of its digits is 2880, while the sum is 24.

The square root of 42321543 is about 6505.5009799400. The cubic root of 42321543 is about 348.4874675323.

Adding to 42321543 its reverse (34512324), we get a palindrome (76833867).

It can be divided in two parts, 4232 and 1543, that added together give a palindrome (5775).

The spelling of 42321543 in words is "forty-two million, three hundred twenty-one thousand, five hundred forty-three".