1145320545 has 16 divisors (see below), whose sum is σ = 1832988672. Its totient is φ = 610679040.

The previous prime is 1145320537. The next prime is 1145320559. The reversal of 1145320545 is 5450235411.

It is not a de Polignac number, because 1145320545 - 2³ = 1145320537 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71200 + ... + 85790.

It is an arithmetic number, because the mean of its divisors is an integer number (114561792).

Almost surely, 2^1145320545 is an apocalyptic number.

1145320545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1145320545 is a deficient number, since it is larger than the sum of its proper divisors (687668127).

1145320545 is a wasteful number, since it uses less digits than its factorization.

1145320545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19832.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 1145320545 is about 33842.5847860355. The cubic root of 1145320545 is about 1046.2665731942.

Adding to 1145320545 its reverse (5450235411), we get a palindrome (6595555956).

The spelling of 1145320545 in words is "one billion, one hundred forty-five million, three hundred twenty thousand, five hundred forty-five".