780243 has 4 divisors (see below), whose sum is σ = 1040328. Its totient is φ = 520160.

The previous prime is 780233. The next prime is 780253. The reversal of 780243 is 342087.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (780233) and next prime (780253).

It is a cyclic number.

It is not a de Polignac number, because 780243 - 2⁵ = 780211 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (780223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130038 + ... + 130043.

It is an arithmetic number, because the mean of its divisors is an integer number (260082).

2⁷⁸⁰²⁴³ is an apocalyptic number.

780243 is a deficient number, since it is larger than the sum of its proper divisors (260085).

780243 is a wasteful number, since it uses less digits than its factorization.

780243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260084.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 780243 is about 883.3136475794. The cubic root of 780243 is about 92.0611990415.

The spelling of 780243 in words is "seven hundred eighty thousand, two hundred forty-three".