1807081121 has 4 divisors (see below), whose sum is σ = 1808711700. Its totient is φ = 1805450544.

The previous prime is 1807081099. The next prime is 1807081183. The reversal of 1807081121 is 1211807081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 930921121 + 876160000 = 30511^2 + 29600^2 .

It is a cyclic number.

It is not a de Polignac number, because 1807081121 - 2¹⁴ = 1807064737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1807081021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 813626 + ... + 815843.

It is an arithmetic number, because the mean of its divisors is an integer number (452177925).

Almost surely, 2^1807081121 is an apocalyptic number.

It is an amenable number.

1807081121 is a deficient number, since it is larger than the sum of its proper divisors (1630579).

1807081121 is a wasteful number, since it uses less digits than its factorization.

1807081121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630578.

The product of its (nonzero) digits is 896, while the sum is 29.

The square root of 1807081121 is about 42509.7767695856. The cubic root of 1807081121 is about 1218.0334529833.

The spelling of 1807081121 in words is "one billion, eight hundred seven million, eighty-one thousand, one hundred twenty-one".