42194091 has 4 divisors (see below), whose sum is σ = 56258792. Its totient is φ = 28129392.

The previous prime is 42194077. The next prime is 42194107. The reversal of 42194091 is 19049124.

42194091 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 not a de Polignac number, because 42194091 - 2¹⁷ = 42063019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42194011) 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, 7032346 + ... + 7032351.

It is an arithmetic number, because the mean of its divisors is an integer number (14064698).

Almost surely, 2^42194091 is an apocalyptic number.

42194091 is a deficient number, since it is larger than the sum of its proper divisors (14064701).

42194091 is a wasteful number, since it uses less digits than its factorization.

42194091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14064700.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 42194091 is about 6495.6978839844. The cubic root of 42194091 is about 348.1372905915.

The spelling of 42194091 in words is "forty-two million, one hundred ninety-four thousand, ninety-one".