1165027641 has 4 divisors (see below), whose sum is σ = 1553370192. Its totient is φ = 776685092.

The previous prime is 1165027639. The next prime is 1165027657. The reversal of 1165027641 is 1467205611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1165027641 - 2¹ = 1165027639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1165027601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194171271 + ... + 194171276.

It is an arithmetic number, because the mean of its divisors is an integer number (388342548).

Almost surely, 2^1165027641 is an apocalyptic number.

It is an amenable number.

1165027641 is a deficient number, since it is larger than the sum of its proper divisors (388342551).

1165027641 is an equidigital number, since it uses as much as digits as its factorization.

1165027641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388342550.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 1165027641 is about 34132.5012414854. The cubic root of 1165027641 is about 1052.2333840202.

The spelling of 1165027641 in words is "one billion, one hundred sixty-five million, twenty-seven thousand, six hundred forty-one".