1141165409 has 4 divisors (see below), whose sum is σ = 1208292804. Its totient is φ = 1074038016.

The previous prime is 1141165391. The next prime is 1141165411. The reversal of 1141165409 is 9045611411.

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 576960400 + 564205009 = 24020^2 + 23753^2 .

It is a cyclic number.

It is not a de Polignac number, because 1141165409 - 2¹⁶ = 1141099873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1141165469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33563672 + ... + 33563705.

It is an arithmetic number, because the mean of its divisors is an integer number (302073201).

Almost surely, 2^1141165409 is an apocalyptic number.

It is an amenable number.

1141165409 is a deficient number, since it is larger than the sum of its proper divisors (67127395).

1141165409 is an equidigital number, since it uses as much as digits as its factorization.

1141165409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67127394.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 1141165409 is about 33781.1398416335. The cubic root of 1141165409 is about 1044.9997814457. Note that the first 3 decimals are identical.

The spelling of 1141165409 in words is "one billion, one hundred forty-one million, one hundred sixty-five thousand, four hundred nine".