42581194 has 4 divisors (see below), whose sum is σ = 63871794. Its totient is φ = 21290596.

The previous prime is 42581179. The next prime is 42581213. The reversal of 42581194 is 49118524.

It is a happy number.

42581194 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 only one way, i.e., 25250625 + 17330569 = 5025^2 + 4163^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10645297 + ... + 10645300.

Almost surely, 2^42581194 is an apocalyptic number.

42581194 is a deficient number, since it is larger than the sum of its proper divisors (21290600).

42581194 is a wasteful number, since it uses less digits than its factorization.

42581194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21290599.

The product of its digits is 11520, while the sum is 34.

The square root of 42581194 is about 6525.4267293412. The cubic root of 42581194 is about 349.1986947480.

The spelling of 42581194 in words is "forty-two million, five hundred eighty-one thousand, one hundred ninety-four".