260605861 has 4 divisors (see below), whose sum is σ = 269592300. Its totient is φ = 251619424.

The previous prime is 260605831. The next prime is 260605897. The reversal of 260605861 is 168506062.

260605861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 168506062 = 2 ⋅84253031.

It can be written as a sum of positive squares in 2 ways, for example, as 216648961 + 43956900 = 14719^2 + 6630^2 .

It is a cyclic number.

It is not a de Polignac number, because 260605861 - 2¹¹ = 260603813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260605831) 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, 4493176 + ... + 4493233.

It is an arithmetic number, because the mean of its divisors is an integer number (67398075).

Almost surely, 2^260605861 is an apocalyptic number.

It is an amenable number.

260605861 is a deficient number, since it is larger than the sum of its proper divisors (8986439).

260605861 is an equidigital number, since it uses as much as digits as its factorization.

260605861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8986438.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 260605861 is about 16143.2915169119. The cubic root of 260605861 is about 638.7458030548.

The spelling of 260605861 in words is "two hundred sixty million, six hundred five thousand, eight hundred sixty-one".