42521461 has 2 divisors, whose sum is σ = 42521462. Its totient is φ = 42521460.

The previous prime is 42521459. The next prime is 42521467. The reversal of 42521461 is 16412524.

It is a happy number.

42521461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39614436 + 2907025 = 6294^2 + 1705^2 .

It is a cyclic number.

It is not a de Polignac number, because 42521461 - 2¹ = 42521459 is a prime.

Together with 42521459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42521467) 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, 21260730 + 21260731.

It is an arithmetic number, because the mean of its divisors is an integer number (21260731).

Almost surely, 2^42521461 is an apocalyptic number.

It is an amenable number.

42521461 is a deficient number, since it is larger than the sum of its proper divisors (1).

42521461 is an equidigital number, since it uses as much as digits as its factorization.

42521461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 25.

The square root of 42521461 is about 6520.8481810268. The cubic root of 42521461 is about 349.0353327501.

Adding to 42521461 its reverse (16412524), we get a palindrome (58933985).

The spelling of 42521461 in words is "forty-two million, five hundred twenty-one thousand, four hundred sixty-one".