197905042 has 4 divisors (see below), whose sum is σ = 296857566. Its totient is φ = 98952520.

The previous prime is 197905027. The next prime is 197905051. The reversal of 197905042 is 240509791.

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., 113614281 + 84290761 = 10659^2 + 9181^2 .

It is a junction number, because it is equal to n+sod(n) for n = 197904992 and 197905010.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49476259 + ... + 49476262.

Almost surely, 2^197905042 is an apocalyptic number.

197905042 is a deficient number, since it is larger than the sum of its proper divisors (98952524).

197905042 is an equidigital number, since it uses as much as digits as its factorization.

197905042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98952523.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 197905042 is about 14067.8726892164. The cubic root of 197905042 is about 582.7544782595.

The spelling of 197905042 in words is "one hundred ninety-seven million, nine hundred five thousand, forty-two".