42135797 has 4 divisors (see below), whose sum is σ = 45966336. Its totient is φ = 38305260.

The previous prime is 42135773. The next prime is 42135799. The reversal of 42135797 is 79753124.

42135797 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, 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-42135797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42135797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42135799) 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, 1915253 + ... + 1915274.

It is an arithmetic number, because the mean of its divisors is an integer number (11491584).

Almost surely, 2^42135797 is an apocalyptic number.

It is an amenable number.

42135797 is a deficient number, since it is larger than the sum of its proper divisors (3830539).

42135797 is a wasteful number, since it uses less digits than its factorization.

42135797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3830538.

The product of its digits is 52920, while the sum is 38.

The square root of 42135797 is about 6491.2092093846. The cubic root of 42135797 is about 347.9768916042.

The spelling of 42135797 in words is "forty-two million, one hundred thirty-five thousand, seven hundred ninety-seven".