789561 has 8 divisors (see below), whose sum is σ = 1169760. Its totient is φ = 526356.

The previous prime is 789557. The next prime is 789571. The reversal of 789561 is 165987.

It is not a de Polignac number, because 789561 - 2² = 789557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (789511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14595 + ... + 14648.

It is an arithmetic number, because the mean of its divisors is an integer number (146220).

2⁷⁸⁹⁵⁶¹ is an apocalyptic number.

It is an amenable number.

789561 is a deficient number, since it is larger than the sum of its proper divisors (380199).

789561 is a wasteful number, since it uses less digits than its factorization.

789561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29252 (or 29246 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 789561 is about 888.5724506195. The cubic root of 789561 is about 92.4262280073.

The spelling of 789561 in words is "seven hundred eighty-nine thousand, five hundred sixty-one".