42519289 has 4 divisors (see below), whose sum is σ = 42555556. Its totient is φ = 42483024.

The previous prime is 42519287. The next prime is 42519293. The reversal of 42519289 is 98291524.

42519289 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 can be written as a sum of positive squares in 2 ways, for example, as 3980025 + 38539264 = 1995^2 + 6208^2 .

It is a cyclic number.

It is not a de Polignac number, because 42519289 - 2¹ = 42519287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42519287) 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, 16314 + ... + 18739.

It is an arithmetic number, because the mean of its divisors is an integer number (10638889).

Almost surely, 2^42519289 is an apocalyptic number.

It is an amenable number.

42519289 is a deficient number, since it is larger than the sum of its proper divisors (36267).

42519289 is a wasteful number, since it uses less digits than its factorization.

42519289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36266.

The product of its digits is 51840, while the sum is 40.

The square root of 42519289 is about 6520.6816361482. The cubic root of 42519289 is about 349.0293897303.

The spelling of 42519289 in words is "forty-two million, five hundred nineteen thousand, two hundred eighty-nine".