1165146641 has 4 divisors (see below), whose sum is σ = 1174321152. Its totient is φ = 1155972132.

The previous prime is 1165146623. The next prime is 1165146643. The reversal of 1165146641 is 1466415611.

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 1165146641 - 2²⁶ = 1098037777 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 (1165146643) 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, 4587065 + ... + 4587318.

It is an arithmetic number, because the mean of its divisors is an integer number (293580288).

Almost surely, 2^1165146641 is an apocalyptic number.

It is an amenable number.

1165146641 is a deficient number, since it is larger than the sum of its proper divisors (9174511).

1165146641 is an equidigital number, since it uses as much as digits as its factorization.

1165146641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9174510.

The product of its digits is 17280, while the sum is 35.

The square root of 1165146641 is about 34134.2444035312. The cubic root of 1165146641 is about 1052.2692090671.

The spelling of 1165146641 in words is "one billion, one hundred sixty-five million, one hundred forty-six thousand, six hundred forty-one".