781325 has 6 divisors (see below), whose sum is σ = 968874. Its totient is φ = 625040.

The previous prime is 781321. The next prime is 781327. The reversal of 781325 is 523187.

It can be written as a sum of positive squares in 3 ways, for example, as 72361 + 708964 = 269^2 + 842^2 .

It is not a de Polignac number, because 781325 - 2² = 781321 is a prime.

It is a super-2 number, since 2×781325² = 1220937511250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 781294 and 781303.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 781325.

It is not an unprimeable number, because it can be changed into a prime (781321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15602 + ... + 15651.

It is an arithmetic number, because the mean of its divisors is an integer number (161479).

781325 is a Friedman number, since it can be written as (37+5^8)*2+1, using all its digits and the basic arithmetic operations.

2⁷⁸¹³²⁵ is an apocalyptic number.

It is an amenable number.

781325 is a deficient number, since it is larger than the sum of its proper divisors (187549).

781325 is a wasteful number, since it uses less digits than its factorization.

781325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31263 (or 31258 counting only the distinct ones).

The product of its digits is 1680, while the sum is 26.

The square root of 781325 is about 883.9259018719. The cubic root of 781325 is about 92.1037345969.

The spelling of 781325 in words is "seven hundred eighty-one thousand, three hundred twenty-five".