780025 has 12 divisors (see below), whose sum is σ = 992124. Its totient is φ = 608000.

The previous prime is 779993. The next prime is 780029. The reversal of 780025 is 520087.

It can be written as a sum of positive squares in 6 ways, for example, as 394384 + 385641 = 628^2 + 621^2 .

It is not a de Polignac number, because 780025 - 2⁵ = 779993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 779978 and 780005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 645 + ... + 1405.

It is an arithmetic number, because the mean of its divisors is an integer number (82677).

2⁷⁸⁰⁰²⁵ is an apocalyptic number.

It is an amenable number.

780025 is a deficient number, since it is larger than the sum of its proper divisors (212099).

780025 is a wasteful number, since it uses less digits than its factorization.

780025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812 (or 807 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 780025 is about 883.1902399823. The cubic root of 780025 is about 92.0526242724.

It can be divided in two parts, 7800 and 25, that multiplied together give a triangular number (195000 = T₆₂₄).

The spelling of 780025 in words is "seven hundred eighty thousand, twenty-five".