851291742 has 16 divisors (see below), whose sum is σ = 1945809792. Its totient is φ = 243226200.

The previous prime is 851291737. The next prime is 851291743. The reversal of 851291742 is 247192158.

It is a self number, because there is not a number n which added to its sum of digits gives 851291742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851291743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10134384 + ... + 10134467.

It is an arithmetic number, because the mean of its divisors is an integer number (121613112).

Almost surely, 2^851291742 is an apocalyptic number.

851291742 is an abundant number, since it is smaller than the sum of its proper divisors (1094518050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

851291742 is a wasteful number, since it uses less digits than its factorization.

851291742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20268863.

The product of its digits is 40320, while the sum is 39.

The square root of 851291742 is about 29176.9042566205. The cubic root of 851291742 is about 947.7478477127.

The spelling of 851291742 in words is "eight hundred fifty-one million, two hundred ninety-one thousand, seven hundred forty-two".