194821142 has 4 divisors (see below), whose sum is σ = 292231716. Its totient is φ = 97410570.

The previous prime is 194821141. The next prime is 194821171. The reversal of 194821142 is 241128491.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 194821099 and 194821108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194821141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48705284 + ... + 48705287.

It is an arithmetic number, because the mean of its divisors is an integer number (73057929).

Almost surely, 2^194821142 is an apocalyptic number.

194821142 is a deficient number, since it is larger than the sum of its proper divisors (97410574).

194821142 is an equidigital number, since it uses as much as digits as its factorization.

194821142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97410573.

The product of its digits is 4608, while the sum is 32.

The square root of 194821142 is about 13957.8344308850. The cubic root of 194821142 is about 579.7116501690.

The spelling of 194821142 in words is "one hundred ninety-four million, eight hundred twenty-one thousand, one hundred forty-two".