42253643 has 4 divisors (see below), whose sum is σ = 42305808. Its totient is φ = 42201480.

The previous prime is 42253633. The next prime is 42253669. The reversal of 42253643 is 34635224.

42253643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42253643 - 2⁶ = 42253579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42253613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24848 + ... + 26493.

It is an arithmetic number, because the mean of its divisors is an integer number (10576452).

Almost surely, 2^42253643 is an apocalyptic number.

42253643 is a deficient number, since it is larger than the sum of its proper divisors (52165).

42253643 is an equidigital number, since it uses as much as digits as its factorization.

42253643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52164.

The product of its digits is 17280, while the sum is 29.

The square root of 42253643 is about 6500.2802247288. The cubic root of 42253643 is about 348.3009985527.

Adding to 42253643 its reverse (34635224), we get a palindrome (76888867).

The spelling of 42253643 in words is "forty-two million, two hundred fifty-three thousand, six hundred forty-three".