1145511256 has 32 divisors (see below), whose sum is σ = 2221977600. Its totient is φ = 553065120.

The previous prime is 1145511179. The next prime is 1145511277. The reversal of 1145511256 is 6521155411.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113971 + ... + 123613.

It is an arithmetic number, because the mean of its divisors is an integer number (69436800).

Almost surely, 2^1145511256 is an apocalyptic number.

It is an amenable number.

1145511256 is a deficient number, since it is larger than the sum of its proper divisors (1076466344).

1145511256 is a wasteful number, since it uses less digits than its factorization.

1145511256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10159 (or 10155 counting only the distinct ones).

The product of its digits is 6000, while the sum is 31.

The square root of 1145511256 is about 33845.4022874600. The cubic root of 1145511256 is about 1046.3246423730.

Adding to 1145511256 its reverse (6521155411), we get a palindrome (7666666667).

The spelling of 1145511256 in words is "one billion, one hundred forty-five million, five hundred eleven thousand, two hundred fifty-six".