1155250545 has 16 divisors (see below), whose sum is σ = 1861702080. Its totient is φ = 611699904.

The previous prime is 1155250529. The next prime is 1155250549. The reversal of 1155250545 is 5450525511.

It is not a de Polignac number, because 1155250545 - 2⁴ = 1155250529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1155250549) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 274954 + ... + 279123.

It is an arithmetic number, because the mean of its divisors is an integer number (116356380).

Almost surely, 2^1155250545 is an apocalyptic number.

1155250545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1155250545 is a deficient number, since it is larger than the sum of its proper divisors (706451535).

1155250545 is a wasteful number, since it uses less digits than its factorization.

1155250545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554224.

The product of its (nonzero) digits is 25000, while the sum is 33.

The square root of 1155250545 is about 33988.9768160208. The cubic root of 1155250545 is about 1049.2816083744.

The spelling of 1155250545 in words is "one billion, one hundred fifty-five million, two hundred fifty thousand, five hundred forty-five".