42503453 has 2 divisors, whose sum is σ = 42503454. Its totient is φ = 42503452.

The previous prime is 42503441. The next prime is 42503477. The reversal of 42503453 is 35430524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25421764 + 17081689 = 5042^2 + 4133^2 .

It is a cyclic number.

It is not a de Polignac number, because 42503453 - 2⁶ = 42503389 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42503413) 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, 21251726 + 21251727.

It is an arithmetic number, because the mean of its divisors is an integer number (21251727).

Almost surely, 2^42503453 is an apocalyptic number.

It is an amenable number.

42503453 is a deficient number, since it is larger than the sum of its proper divisors (1).

42503453 is an equidigital number, since it uses as much as digits as its factorization.

42503453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 42503453 is about 6519.4672328343. The cubic root of 42503453 is about 348.9860531970.

Adding to 42503453 its reverse (35430524), we get a palindrome (77933977).

The spelling of 42503453 in words is "forty-two million, five hundred three thousand, four hundred fifty-three".