1145264561 has 8 divisors (see below), whose sum is σ = 1310317824. Its totient is φ = 980572320.

The previous prime is 1145264531. The next prime is 1145264587. The reversal of 1145264561 is 1654625411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1145264561 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 (1145264531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83420 + ... + 96173.

It is an arithmetic number, because the mean of its divisors is an integer number (163789728).

Almost surely, 2^1145264561 is an apocalyptic number.

It is an amenable number.

1145264561 is a deficient number, since it is larger than the sum of its proper divisors (165053263).

1145264561 is an equidigital number, since it uses as much as digits as its factorization.

1145264561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180511.

The product of its digits is 28800, while the sum is 35.

The square root of 1145264561 is about 33841.7576523442. The cubic root of 1145264561 is about 1046.2495255236.

Adding to 1145264561 its reverse (1654625411), we get a palindrome (2799889972).

The spelling of 1145264561 in words is "one billion, one hundred forty-five million, two hundred sixty-four thousand, five hundred sixty-one".