42194066 has 8 divisors (see below), whose sum is σ = 64328844. Its totient is φ = 20751120.

The previous prime is 42194057. The next prime is 42194077. The reversal of 42194066 is 66049124.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 34515625 + 7678441 = 5875^2 + 2771^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×42194066² = 3560678411224712, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 172805 + ... + 173048.

Almost surely, 2^42194066 is an apocalyptic number.

42194066 is a deficient number, since it is larger than the sum of its proper divisors (22134778).

42194066 is a wasteful number, since it uses less digits than its factorization.

42194066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345916.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 42194066 is about 6495.6959596336. The cubic root of 42194066 is about 348.1372218343.

The spelling of 42194066 in words is "forty-two million, one hundred ninety-four thousand, sixty-six".