42142519 has 4 divisors (see below), whose sum is σ = 43281544. Its totient is φ = 41003496.

The previous prime is 42142517. The next prime is 42142543. The reversal of 42142519 is 91524124.

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

It is a cyclic number.

It is not a de Polignac number, because 42142519 - 2¹ = 42142517 is a prime.

It is a super-2 number, since 2×42142519² = 3551983815330722, 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 (42142511) 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, 569457 + ... + 569530.

It is an arithmetic number, because the mean of its divisors is an integer number (10820386).

Almost surely, 2^42142519 is an apocalyptic number.

42142519 is a deficient number, since it is larger than the sum of its proper divisors (1139025).

42142519 is a wasteful number, since it uses less digits than its factorization.

42142519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139024.

The product of its digits is 2880, while the sum is 28.

The square root of 42142519 is about 6491.7269659159. The cubic root of 42142519 is about 347.9953950815.

The spelling of 42142519 in words is "forty-two million, one hundred forty-two thousand, five hundred nineteen".