764125281 has 6 divisors (see below), whose sum is σ = 1103736530. Its totient is φ = 509416848.

The previous prime is 764125279. The next prime is 764125283. The reversal of 764125281 is 182521467.

764125281 is a `hidden beast` number, since 7 + 641 + 2 + 5 + 2 + 8 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (764125279) and next prime (764125283).

It can be written as a sum of positive squares in only one way, i.e., 431974656 + 332150625 = 20784^2 + 18225^2 .

It is not a de Polignac number, because 764125281 - 2¹ = 764125279 is a prime.

It is a super-2 number, since 2×764125281² = 1167774890126657922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (764125283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42451396 + ... + 42451413.

Almost surely, 2^764125281 is an apocalyptic number.

It is an amenable number.

764125281 is a deficient number, since it is larger than the sum of its proper divisors (339611249).

764125281 is a wasteful number, since it uses less digits than its factorization.

764125281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84902815 (or 84902812 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 764125281 is about 27642.8160830260. The cubic root of 764125281 is about 914.2287113166.

The spelling of 764125281 in words is "seven hundred sixty-four million, one hundred twenty-five thousand, two hundred eighty-one".