42544451 has 2 divisors, whose sum is σ = 42544452. Its totient is φ = 42544450.

The previous prime is 42544393. The next prime is 42544471. The reversal of 42544451 is 15444524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42544451 - 2¹⁰ = 42543427 is a prime.

It is not a weakly prime, because it can be changed into another prime (42544471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21272225 + 21272226.

It is an arithmetic number, because the mean of its divisors is an integer number (21272226).

Almost surely, 2^42544451 is an apocalyptic number.

42544451 is a deficient number, since it is larger than the sum of its proper divisors (1).

42544451 is an equidigital number, since it uses as much as digits as its factorization.

42544451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12800, while the sum is 29.

The square root of 42544451 is about 6522.6107503054. The cubic root of 42544451 is about 349.0982255136.

Adding to 42544451 its reverse (15444524), we get a palindrome (57988975).

The spelling of 42544451 in words is "forty-two million, five hundred forty-four thousand, four hundred fifty-one".