840675242 has 16 divisors (see below), whose sum is σ = 1376416800. Its totient is φ = 381912240.

The previous prime is 840675223. The next prime is 840675257. The reversal of 840675242 is 242576048.

It is a junction number, because it is equal to n+sod(n) for n = 840675196 and 840675205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33884 + ... + 53192.

It is an arithmetic number, because the mean of its divisors is an integer number (86026050).

Almost surely, 2^840675242 is an apocalyptic number.

840675242 is a deficient number, since it is larger than the sum of its proper divisors (535741558).

840675242 is a wasteful number, since it uses less digits than its factorization.

840675242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21301.

The product of its (nonzero) digits is 107520, while the sum is 38.

The square root of 840675242 is about 28994.4001834837. The cubic root of 840675242 is about 943.7915525643.

The spelling of 840675242 in words is "eight hundred forty million, six hundred seventy-five thousand, two hundred forty-two".