42103517 has 4 divisors (see below), whose sum is σ = 42406560. Its totient is φ = 41800476.

The previous prime is 42103513. The next prime is 42103541. The reversal of 42103517 is 71530124.

42103517 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 not a de Polignac number, because 42103517 - 2² = 42103513 is a prime.

It is a super-2 number, since 2×42103517² = 3545412287538578, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42103492 and 42103501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42103511) 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, 151313 + ... + 151590.

It is an arithmetic number, because the mean of its divisors is an integer number (10601640).

Almost surely, 2^42103517 is an apocalyptic number.

It is an amenable number.

42103517 is a deficient number, since it is larger than the sum of its proper divisors (303043).

42103517 is a wasteful number, since it uses less digits than its factorization.

42103517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303042.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 42103517 is about 6488.7222933333. The cubic root of 42103517 is about 347.8880078481. Note that the first 3 decimals are identical.

The spelling of 42103517 in words is "forty-two million, one hundred three thousand, five hundred seventeen".