1145312553 has 48 divisors (see below), whose sum is σ = 1930521600. Its totient is φ = 591185760.

The previous prime is 1145312537. The next prime is 1145312557. The reversal of 1145312553 is 3552135411.

It is not a de Polignac number, because 1145312553 - 2⁴ = 1145312537 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1145312553.

It is not an unprimeable number, because it can be changed into a prime (1145312557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 422998 + ... + 425696.

It is an arithmetic number, because the mean of its divisors is an integer number (40219200).

Almost surely, 2^1145312553 is an apocalyptic number.

It is an amenable number.

1145312553 is a deficient number, since it is larger than the sum of its proper divisors (785209047).

1145312553 is a wasteful number, since it uses less digits than its factorization.

1145312553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898 (or 2887 counting only the distinct ones).

The product of its digits is 9000, while the sum is 30.

The square root of 1145312553 is about 33842.4667097421. The cubic root of 1145312553 is about 1046.2641395867.

Adding to 1145312553 its reverse (3552135411), we get a palindrome (4697447964).

The spelling of 1145312553 in words is "one billion, one hundred forty-five million, three hundred twelve thousand, five hundred fifty-three".