42120541 has 4 divisors (see below), whose sum is σ = 43258972. Its totient is φ = 40982112.

The previous prime is 42120523. The next prime is 42120563. The reversal of 42120541 is 14502124.

42120541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37773316 + 4347225 = 6146^2 + 2085^2 .

It is a cyclic number.

It is not a de Polignac number, because 42120541 - 2²³ = 33731933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42120581) 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 3 ways as a sum of consecutive naturals, for example, 569160 + ... + 569233.

It is an arithmetic number, because the mean of its divisors is an integer number (10814743).

Almost surely, 2^42120541 is an apocalyptic number.

It is an amenable number.

42120541 is a deficient number, since it is larger than the sum of its proper divisors (1138431).

42120541 is a wasteful number, since it uses less digits than its factorization.

42120541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138430.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 42120541 is about 6490.0339752578. The cubic root of 42120541 is about 347.9348895009.

Adding to 42120541 its reverse (14502124), we get a palindrome (56622665).

The spelling of 42120541 in words is "forty-two million, one hundred twenty thousand, five hundred forty-one".