42505453 has 2 divisors, whose sum is σ = 42505454. Its totient is φ = 42505452.

The previous prime is 42505447. The next prime is 42505469. The reversal of 42505453 is 35450524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31832164 + 10673289 = 5642^2 + 3267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42505453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42503453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21252726 + 21252727.

It is an arithmetic number, because the mean of its divisors is an integer number (21252727).

Almost surely, 2^42505453 is an apocalyptic number.

It is an amenable number.

42505453 is a deficient number, since it is larger than the sum of its proper divisors (1).

42505453 is an equidigital number, since it uses as much as digits as its factorization.

42505453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 42505453 is about 6519.6206177967. The cubic root of 42505453 is about 348.9915269575.

Adding to 42505453 its reverse (35450524), we get a palindrome (77955977).

The spelling of 42505453 in words is "forty-two million, five hundred five thousand, four hundred fifty-three".