1211150545 has 16 divisors (see below), whose sum is σ = 1586443968. Its totient is φ = 880315840.

The previous prime is 1211150539. The next prime is 1211150579. The reversal of 1211150545 is 5450511121.

It is not a de Polignac number, because 1211150545 - 2⁹ = 1211150033 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 104322 + ... + 115348.

It is an arithmetic number, because the mean of its divisors is an integer number (99152748).

Almost surely, 2^1211150545 is an apocalyptic number.

It is an amenable number.

1211150545 is a deficient number, since it is larger than the sum of its proper divisors (375293423).

1211150545 is a wasteful number, since it uses less digits than its factorization.

1211150545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13040.

The product of its (nonzero) digits is 1000, while the sum is 25.

The square root of 1211150545 is about 34801.5882539863. The cubic root of 1211150545 is about 1065.9398772451.

Adding to 1211150545 its reverse (5450511121), we get a palindrome (6661661666).

The spelling of 1211150545 in words is "one billion, two hundred eleven million, one hundred fifty thousand, five hundred forty-five".