42504481 has 2 divisors, whose sum is σ = 42504482. Its totient is φ = 42504480.

The previous prime is 42504479. The next prime is 42504491. The reversal of 42504481 is 18440524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42458256 + 46225 = 6516^2 + 215^2 .

It is a cyclic number.

It is not a de Polignac number, because 42504481 - 2¹ = 42504479 is a prime.

It is a super-2 number, since 2×42504481² = 3613261810158722, which contains 22 as substring.

Together with 42504479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42504491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21252240 + 21252241.

It is an arithmetic number, because the mean of its divisors is an integer number (21252241).

Almost surely, 2^42504481 is an apocalyptic number.

It is an amenable number.

42504481 is a deficient number, since it is larger than the sum of its proper divisors (1).

42504481 is an equidigital number, since it uses as much as digits as its factorization.

42504481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 42504481 is about 6519.5460731557. The cubic root of 42504481 is about 348.9888667313.

The spelling of 42504481 in words is "forty-two million, five hundred four thousand, four hundred eighty-one".