42517919 has 4 divisors (see below), whose sum is σ = 42733944. Its totient is φ = 42301896.

The previous prime is 42517907. The next prime is 42517931. The reversal of 42517919 is 91971524.

42517919 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.

It is an interprime number because it is at equal distance from previous prime (42517907) and next prime (42517931).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42517919 is a prime.

It is a super-2 number, since 2×42517919² = 3615546872181122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42507919) 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, 107717 + ... + 108110.

It is an arithmetic number, because the mean of its divisors is an integer number (10683486).

Almost surely, 2^42517919 is an apocalyptic number.

42517919 is a deficient number, since it is larger than the sum of its proper divisors (216025).

42517919 is a wasteful number, since it uses less digits than its factorization.

42517919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216024.

The product of its digits is 22680, while the sum is 38.

The square root of 42517919 is about 6520.5765849348. The cubic root of 42517919 is about 349.0256410364.

The spelling of 42517919 in words is "forty-two million, five hundred seventeen thousand, nine hundred nineteen".