780725 has 24 divisors (see below), whose sum is σ = 1124928. Its totient is φ = 531200.

The previous prime is 780721. The next prime is 780733. The reversal of 780725 is 527087.

It is not a de Polignac number, because 780725 - 2² = 780721 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780721) 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 23 ways as a sum of consecutive naturals, for example, 4592 + ... + 4758.

It is an arithmetic number, because the mean of its divisors is an integer number (46872).

2⁷⁸⁰⁷²⁵ is an apocalyptic number.

It is an amenable number.

780725 is a deficient number, since it is larger than the sum of its proper divisors (344203).

780725 is a wasteful number, since it uses less digits than its factorization.

780725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 780725 is about 883.5864417249. The cubic root of 780725 is about 92.0801522666.

The spelling of 780725 in words is "seven hundred eighty thousand, seven hundred twenty-five".