775721142 has 48 divisors (see below), whose sum is σ = 1922592672. Its totient is φ = 221431680.

The previous prime is 775721131. The next prime is 775721159. The reversal of 775721142 is 241127577.

775721142 is a `hidden beast` number, since 77 + 572 + 1 + 14 + 2 = 666.

775721142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 775721097 and 775721106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 184528 + ... + 188684.

It is an arithmetic number, because the mean of its divisors is an integer number (40054014).

Almost surely, 2^775721142 is an apocalyptic number.

775721142 is an abundant number, since it is smaller than the sum of its proper divisors (1146871530).

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

775721142 is a wasteful number, since it uses less digits than its factorization.

775721142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5653 (or 5650 counting only the distinct ones).

The product of its digits is 27440, while the sum is 36.

The square root of 775721142 is about 27851.7708952232. The cubic root of 775721142 is about 918.8300905885.

The spelling of 775721142 in words is "seven hundred seventy-five million, seven hundred twenty-one thousand, one hundred forty-two".