765020281 has 9 divisors (see below), whose sum is σ = 813168399. Its totient is φ = 719576544.

The previous prime is 765020231. The next prime is 765020287. The reversal of 765020281 is 182020567.

The square root of 765020281 is 27659.

It is a perfect power (a square), and thus also a powerful number.

765020281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 595604025 + 169416256 = 24405^2 + 13016^2 .

It is not a de Polignac number, because 765020281 - 2¹⁹ = 764495993 is a prime.

It is a super-2 number, since 2×765020281² = 1170512060682637922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (765020287) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 469390 + ... + 471016.

Almost surely, 2^765020281 is an apocalyptic number.

765020281 is the 27659-th square number.

765020281 is the 13830-th centered octagonal number.

It is an amenable number.

765020281 is a deficient number, since it is larger than the sum of its proper divisors (48148118).

765020281 is an frugal number, since it uses more digits than its factorization.

765020281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3288 (or 1644 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The cubic root of 765020281 is about 914.5855094603.

The spelling of 765020281 in words is "seven hundred sixty-five million, twenty thousand, two hundred eighty-one".