1163261545 has 4 divisors (see below), whose sum is σ = 1395913860. Its totient is φ = 930609232.

The previous prime is 1163261509. The next prime is 1163261563. The reversal of 1163261545 is 5451623611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5451623611 = 7 ⋅778803373.

It can be written as a sum of positive squares in 2 ways, for example, as 723394816 + 439866729 = 26896^2 + 20973^2 .

It is a cyclic number.

It is not a de Polignac number, because 1163261545 - 2¹¹ = 1163259497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1163261545.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116326150 + ... + 116326159.

It is an arithmetic number, because the mean of its divisors is an integer number (348978465).

Almost surely, 2^1163261545 is an apocalyptic number.

It is an amenable number.

1163261545 is a deficient number, since it is larger than the sum of its proper divisors (232652315).

1163261545 is an equidigital number, since it uses as much as digits as its factorization.

1163261545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232652314.

The product of its digits is 21600, while the sum is 34.

The square root of 1163261545 is about 34106.6202517928. The cubic root of 1163261545 is about 1051.7014123785.

The spelling of 1163261545 in words is "one billion, one hundred sixty-three million, two hundred sixty-one thousand, five hundred forty-five".