194578042 has 8 divisors (see below), whose sum is σ = 299755476. Its totient is φ = 94659552.

The previous prime is 194578009. The next prime is 194578051. The reversal of 194578042 is 240875491.

194578042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 194017041 + 561001 = 13929^2 + 749^2 .

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

It is a super-2 number, since 2×194578042² = 75721228857107528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 194577986 and 194578004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1314643 + ... + 1314790.

Almost surely, 2^194578042 is an apocalyptic number.

194578042 is a deficient number, since it is larger than the sum of its proper divisors (105177434).

194578042 is a wasteful number, since it uses less digits than its factorization.

194578042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2629472.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 194578042 is about 13949.1233416298. The cubic root of 194578042 is about 579.4704262469.

The spelling of 194578042 in words is "one hundred ninety-four million, five hundred seventy-eight thousand, forty-two".