42621243 has 16 divisors (see below), whose sum is σ = 65446656. Its totient is φ = 24167520.

The previous prime is 42621233. The next prime is 42621283. The reversal of 42621243 is 34212624.

42621243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42621243 - 2⁸ = 42620987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42621233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4996 + ... + 10497.

It is an arithmetic number, because the mean of its divisors is an integer number (4090416).

Almost surely, 2^42621243 is an apocalyptic number.

42621243 is a deficient number, since it is larger than the sum of its proper divisors (22825413).

42621243 is a wasteful number, since it uses less digits than its factorization.

42621243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15634.

The product of its digits is 2304, while the sum is 24.

The square root of 42621243 is about 6528.4946963293. The cubic root of 42621243 is about 349.3081380259.

Adding to 42621243 its reverse (34212624), we get a palindrome (76833867).

The spelling of 42621243 in words is "forty-two million, six hundred twenty-one thousand, two hundred forty-three".