42519778 has 16 divisors (see below), whose sum is σ = 76060800. Its totient is φ = 17430336.

The previous prime is 42519769. The next prime is 42519791. The reversal of 42519778 is 87791524.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65703 + ... + 66346.

It is an arithmetic number, because the mean of its divisors is an integer number (4753800).

Almost surely, 2^42519778 is an apocalyptic number.

42519778 is a deficient number, since it is larger than the sum of its proper divisors (33541022).

42519778 is a wasteful number, since it uses less digits than its factorization.

42519778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132081.

The product of its digits is 141120, while the sum is 43.

The square root of 42519778 is about 6520.7191321203. The cubic root of 42519778 is about 349.0307277483.

The spelling of 42519778 in words is "forty-two million, five hundred nineteen thousand, seven hundred seventy-eight".