780567 has 4 divisors (see below), whose sum is σ = 1040760. Its totient is φ = 520376.

The previous prime is 780553. The next prime is 780583. The reversal of 780567 is 765087.

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

It is a cyclic number.

It is not a de Polignac number, because 780567 - 2¹⁰ = 779543 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780587) 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, 130092 + ... + 130097.

It is an arithmetic number, because the mean of its divisors is an integer number (260190).

2⁷⁸⁰⁵⁶⁷ is an apocalyptic number.

780567 is a deficient number, since it is larger than the sum of its proper divisors (260193).

780567 is a wasteful number, since it uses less digits than its factorization.

780567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260192.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 780567 is about 883.4970288575. The cubic root of 780567 is about 92.0739402434.

The spelling of 780567 in words is "seven hundred eighty thousand, five hundred sixty-seven".