42345253 has 4 divisors (see below), whose sum is σ = 42781900. Its totient is φ = 41908608.

The previous prime is 42345223. The next prime is 42345263. The reversal of 42345253 is 35254324.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31730689 + 10614564 = 5633^2 + 3258^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42345253 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 (42345203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218178 + ... + 218371.

It is an arithmetic number, because the mean of its divisors is an integer number (10695475).

Almost surely, 2^42345253 is an apocalyptic number.

It is an amenable number.

42345253 is a deficient number, since it is larger than the sum of its proper divisors (436647).

42345253 is an equidigital number, since it uses as much as digits as its factorization.

42345253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436646.

The product of its digits is 14400, while the sum is 28.

The square root of 42345253 is about 6507.3230287116. The cubic root of 42345253 is about 348.5525336487.

Adding to 42345253 its reverse (35254324), we get a palindrome (77599577).

The spelling of 42345253 in words is "forty-two million, three hundred forty-five thousand, two hundred fifty-three".