1165081 has 2 divisors, whose sum is σ = 1165082. Its totient is φ = 1165080.

The previous prime is 1165079. The next prime is 1165103. The reversal of 1165081 is 1805611.

It is an a-pointer prime, because the next prime (1165103) can be obtained adding 1165081 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 697225 + 467856 = 835^2 + 684^2 .

It is a cyclic number.

It is not a de Polignac number, because 1165081 - 2¹ = 1165079 is a prime.

It is a super-2 number, since 2×1165081² = 2714827473122, which contains 22 as substring.

Together with 1165079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1165001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582540 + 582541.

It is an arithmetic number, because the mean of its divisors is an integer number (582541).

2^1165081 is an apocalyptic number.

It is an amenable number.

1165081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165081 is an equidigital number, since it uses as much as digits as its factorization.

1165081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 1165081 is about 1079.3891791194. The cubic root of 1165081 is about 105.2249448092.

The spelling of 1165081 in words is "one million, one hundred sixty-five thousand, eighty-one".