42405253 has 4 divisors (see below), whose sum is σ = 46260288. Its totient is φ = 38550220.

The previous prime is 42405197. The next prime is 42405269. The reversal of 42405253 is 35250424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42405253 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 (42405953) 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, 1927501 + ... + 1927522.

It is an arithmetic number, because the mean of its divisors is an integer number (11565072).

Almost surely, 2^42405253 is an apocalyptic number.

It is an amenable number.

42405253 is a deficient number, since it is larger than the sum of its proper divisors (3855035).

42405253 is a wasteful number, since it uses less digits than its factorization.

42405253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3855034.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 42405253 is about 6511.9315874785. The cubic root of 42405253 is about 348.7170800922.

Adding to 42405253 its reverse (35250424), we get a palindrome (77655677).

The spelling of 42405253 in words is "forty-two million, four hundred five thousand, two hundred fifty-three".