260091081 has 10 divisors (see below), whose sum is σ = 388531242. Its totient is φ = 173394000.

The previous prime is 260091079. The next prime is 260091103. The reversal of 260091081 is 180190062.

It can be written as a sum of positive squares in only one way, i.e., 187142400 + 72948681 = 13680^2 + 8541^2 .

It is not a de Polignac number, because 260091081 - 2¹ = 260091079 is a prime.

It is a super-2 number, since 2×260091081² = 135294740831497122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (260091011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1605420 + ... + 1605581.

Almost surely, 2^260091081 is an apocalyptic number.

It is an amenable number.

260091081 is a deficient number, since it is larger than the sum of its proper divisors (128440161).

260091081 is an equidigital number, since it uses as much as digits as its factorization.

260091081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3211013 (or 3211004 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 260091081 is about 16127.3395512093. The cubic root of 260091081 is about 638.3249500149.

The spelling of 260091081 in words is "two hundred sixty million, ninety-one thousand, eighty-one".