842749785 has 64 divisors (see below), whose sum is σ = 1587087360. Its totient is φ = 423403200.

The previous prime is 842749771. The next prime is 842749799. The reversal of 842749785 is 587947248.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (842749771) and next prime (842749799).

It is not a de Polignac number, because 842749785 - 2⁸ = 842749529 is a prime.

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 63 ways as a sum of consecutive naturals, for example, 206010 + ... + 210060.

It is an arithmetic number, because the mean of its divisors is an integer number (24798240).

Almost surely, 2^842749785 is an apocalyptic number.

It is an amenable number.

842749785 is a deficient number, since it is larger than the sum of its proper divisors (744337575).

842749785 is a wasteful number, since it uses less digits than its factorization.

842749785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4155 (or 4149 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The square root of 842749785 is about 29030.1530309435. The cubic root of 842749785 is about 944.5672495777.

The spelling of 842749785 in words is "eight hundred forty-two million, seven hundred forty-nine thousand, seven hundred eighty-five".