42243253 has 4 divisors (see below), whose sum is σ = 45492748. Its totient is φ = 38993760.

The previous prime is 42243247. The next prime is 42243259. The reversal of 42243253 is 35234224.

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

It is an interprime number because it is at equal distance from previous prime (42243247) and next prime (42243259).

It can be written as a sum of positive squares in 2 ways, for example, as 3392964 + 38850289 = 1842^2 + 6233^2 .

It is a de Polignac number, because none of the positive numbers 2^k-42243253 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 (42243259) 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 3 ways as a sum of consecutive naturals, for example, 1624728 + ... + 1624753.

It is an arithmetic number, because the mean of its divisors is an integer number (11373187).

Almost surely, 2^42243253 is an apocalyptic number.

It is an amenable number.

42243253 is a deficient number, since it is larger than the sum of its proper divisors (3249495).

42243253 is a wasteful number, since it uses less digits than its factorization.

42243253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3249494.

The product of its digits is 5760, while the sum is 25.

The square root of 42243253 is about 6499.4809792783. The cubic root of 42243253 is about 348.2724476099.

Adding to 42243253 its reverse (35234224), we get a palindrome (77477477).

The spelling of 42243253 in words is "forty-two million, two hundred forty-three thousand, two hundred fifty-three".