42506453 has 6 divisors (see below), whose sum is σ = 46722102. Its totient is φ = 38642120.

The previous prime is 42506449. The next prime is 42506473. The reversal of 42506453 is 35460524.

It can be written as a sum of positive squares in only one way, i.e., 41692849 + 813604 = 6457^2 + 902^2 .

It is not a de Polignac number, because 42506453 - 2² = 42506449 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42506413) 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 in 5 ways as a sum of consecutive naturals, for example, 175526 + ... + 175767.

It is an arithmetic number, because the mean of its divisors is an integer number (7787017).

Almost surely, 2^42506453 is an apocalyptic number.

It is an amenable number.

42506453 is a deficient number, since it is larger than the sum of its proper divisors (4215649).

42506453 is a wasteful number, since it uses less digits than its factorization.

42506453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351315 (or 351304 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 42506453 is about 6519.6973089247. The cubic root of 42506453 is about 348.9942637733.

Adding to 42506453 its reverse (35460524), we get a palindrome (77966977).

The spelling of 42506453 in words is "forty-two million, five hundred six thousand, four hundred fifty-three".