1205801081 has 8 divisors (see below), whose sum is σ = 1212942624. Its totient is φ = 1198679040.

The previous prime is 1205801053. The next prime is 1205801099. The reversal of 1205801081 is 1801085021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1205801081 - 2¹⁸ = 1205538937 is a prime.

It is a super-2 number, since 2×1205801081² = 2907912493881537122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1205801081.

It is not an unprimeable number, because it can be changed into a prime (1205801011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129926 + ... + 138896.

It is an arithmetic number, because the mean of its divisors is an integer number (151617828).

Almost surely, 2^1205801081 is an apocalyptic number.

It is an amenable number.

1205801081 is a deficient number, since it is larger than the sum of its proper divisors (7141543).

1205801081 is an equidigital number, since it uses as much as digits as its factorization.

1205801081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9751.

The product of its (nonzero) digits is 640, while the sum is 26.

The square root of 1205801081 is about 34724.6465928741. The cubic root of 1205801081 is about 1064.3681973416.

The spelling of 1205801081 in words is "one billion, two hundred five million, eight hundred one thousand, eighty-one".