850139242 has 4 divisors (see below), whose sum is σ = 1275208866. Its totient is φ = 425069620.

The previous prime is 850139209. The next prime is 850139267. The reversal of 850139242 is 242931058.

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., 847916161 + 2223081 = 29119^2 + 1491^2 .

It is a junction number, because it is equal to n+sod(n) for n = 850139198 and 850139207.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 212534809 + ... + 212534812.

Almost surely, 2^850139242 is an apocalyptic number.

850139242 is a deficient number, since it is larger than the sum of its proper divisors (425069624).

850139242 is a wasteful number, since it uses less digits than its factorization.

850139242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425069623.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 850139242 is about 29157.1473570375. The cubic root of 850139242 is about 947.3199596652.

The spelling of 850139242 in words is "eight hundred fifty million, one hundred thirty-nine thousand, two hundred forty-two".