1211130545 has 8 divisors (see below), whose sum is σ = 1484279424. Its totient is φ = 948289264.

The previous prime is 1211130467. The next prime is 1211130563. The reversal of 1211130545 is 5450311121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211130545 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211130545.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2576639 + ... + 2577108.

It is an arithmetic number, because the mean of its divisors is an integer number (185534928).

Almost surely, 2^1211130545 is an apocalyptic number.

It is an amenable number.

1211130545 is a deficient number, since it is larger than the sum of its proper divisors (273148879).

1211130545 is an equidigital number, since it uses as much as digits as its factorization.

1211130545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5153799.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1211130545 is about 34801.3009095924. The cubic root of 1211130545 is about 1065.9340098449.

Adding to 1211130545 its reverse (5450311121), we get a palindrome (6661441666).

The spelling of 1211130545 in words is "one billion, two hundred eleven million, one hundred thirty thousand, five hundred forty-five".