42012541 has 2 divisors, whose sum is σ = 42012542. Its totient is φ = 42012540.

The previous prime is 42012521. The next prime is 42012547. The reversal of 42012541 is 14521024.

42012541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35402500 + 6610041 = 5950^2 + 2571^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42012541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42012547) 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 as a sum of consecutive naturals, namely, 21006270 + 21006271.

It is an arithmetic number, because the mean of its divisors is an integer number (21006271).

Almost surely, 2^42012541 is an apocalyptic number.

It is an amenable number.

42012541 is a deficient number, since it is larger than the sum of its proper divisors (1).

42012541 is an equidigital number, since it uses as much as digits as its factorization.

42012541 is an odious number, because the sum of its binary digits is odd.

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

The square root of 42012541 is about 6481.7081853474. The cubic root of 42012541 is about 347.6372585458.

Adding to 42012541 its reverse (14521024), we get a palindrome (56533565).

The spelling of 42012541 in words is "forty-two million, twelve thousand, five hundred forty-one".