786161 has 4 divisors (see below), whose sum is σ = 813300. Its totient is φ = 759024.

The previous prime is 786151. The next prime is 786167. The reversal of 786161 is 161687.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161687 = 17 ⋅9511.

It can be written as a sum of positive squares in 2 ways, for example, as 323761 + 462400 = 569^2 + 680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-786161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 27109 = 786161 / (7 + 8 + 6 + 1 + 6 + 1).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (786167) 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, 13526 + ... + 13583.

It is an arithmetic number, because the mean of its divisors is an integer number (203325).

2⁷⁸⁶¹⁶¹ is an apocalyptic number.

It is an amenable number.

786161 is a deficient number, since it is larger than the sum of its proper divisors (27139).

786161 is a wasteful number, since it uses less digits than its factorization.

786161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27138.

The product of its digits is 2016, while the sum is 29.

The square root of 786161 is about 886.6572054633. The cubic root of 786161 is about 92.2933688067.

It can be divided in two parts, 7 and 86161, that added together give a palindrome (86168).

The spelling of 786161 in words is "seven hundred eighty-six thousand, one hundred sixty-one".