1345009081 has 8 divisors (see below), whose sum is σ = 1463405384. Its totient is φ = 1228746240.

The previous prime is 1345009079. The next prime is 1345009117. The reversal of 1345009081 is 1809005431.

It can be written as a sum of positive squares in 4 ways, for example, as 24413481 + 1320595600 = 4941^2 + 36340^2 .

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 1345009081 - 2¹ = 1345009079 is a prime.

It is a super-2 number, since 2×1345009081² = 3618098855944929122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1345009051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532050 + ... + 534571.

It is an arithmetic number, because the mean of its divisors is an integer number (182925673).

Almost surely, 2^1345009081 is an apocalyptic number.

It is an amenable number.

1345009081 is a deficient number, since it is larger than the sum of its proper divisors (118396303).

1345009081 is a wasteful number, since it uses less digits than its factorization.

1345009081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066731.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1345009081 is about 36674.3654478165. The cubic root of 1345009081 is about 1103.8457897505.

The spelling of 1345009081 in words is "one billion, three hundred forty-five million, nine thousand, eighty-one".